| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Christoph Hellwig | 8261 | 34.23% | 10 | 3.29% |
| J. Bruce Fields | 5072 | 21.02% | 117 | 38.49% |
| Neil Brown | 4874 | 20.20% | 37 | 12.17% |
| Andy Adamson | 1239 | 5.13% | 9 | 2.96% |
| Benny Halevy | 1197 | 4.96% | 21 | 6.91% |
| Anna Schumaker | 939 | 3.89% | 11 | 3.62% |
| Olga Kornievskaia | 845 | 3.50% | 5 | 1.64% |
| Kinglong Mee | 457 | 1.89% | 17 | 5.59% |
| David P. Quigley | 199 | 0.82% | 1 | 0.33% |
| Chuck Lever | 163 | 0.68% | 10 | 3.29% |
| Trond Myklebust | 148 | 0.61% | 9 | 2.96% |
| Andrew Morton | 112 | 0.46% | 7 | 2.30% |
| Jeff Layton | 106 | 0.44% | 5 | 1.64% |
| Mi Jinlong | 98 | 0.41% | 4 | 1.32% |
| Andreas Gruenbacher | 96 | 0.40% | 2 | 0.66% |
| Al Viro | 72 | 0.30% | 7 | 2.30% |
| Andrew Elble | 71 | 0.29% | 1 | 0.33% |
| Eric W. Biedermann | 46 | 0.19% | 2 | 0.66% |
| Scott Mayhew | 25 | 0.10% | 2 | 0.66% |
| Randy Dunlap | 19 | 0.08% | 1 | 0.33% |
| Weston Andros Adamson | 18 | 0.07% | 1 | 0.33% |
| Arnd Bergmann | 17 | 0.07% | 3 | 0.99% |
| David Howells | 14 | 0.06% | 2 | 0.66% |
| Frank Filz | 5 | 0.02% | 1 | 0.33% |
| Stanislav Kinsbursky | 5 | 0.02% | 1 | 0.33% |
| Benjamin Coddington | 5 | 0.02% | 2 | 0.66% |
| Andi Kleen | 4 | 0.02% | 1 | 0.33% |
| Thomas Meyer | 4 | 0.02% | 1 | 0.33% |
| Tejun Heo | 3 | 0.01% | 1 | 0.33% |
| Boaz Harrosh | 2 | 0.01% | 2 | 0.66% |
| Avi Kivity | 2 | 0.01% | 1 | 0.33% |
| Eric Sesterhenn / Snakebyte | 2 | 0.01% | 1 | 0.33% |
| Amir Goldstein | 2 | 0.01% | 1 | 0.33% |
| Yu Zhiguo | 2 | 0.01% | 1 | 0.33% |
| Daniel Mack | 1 | 0.00% | 1 | 0.33% |
| Dan Carpenter | 1 | 0.00% | 1 | 0.33% |
| Miklos Szeredi | 1 | 0.00% | 1 | 0.33% |
| Steve Dickson | 1 | 0.00% | 1 | 0.33% |
| nixiaoming | 1 | 0.00% | 1 | 0.33% |
| Greg Banks | 1 | 0.00% | 1 | 0.33% |
| Fred Isaman | 1 | 0.00% | 1 | 0.33% |
| Total | 24131 | 304 |
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/* * Server-side XDR for NFSv4 * * Copyright (c) 2002 The Regents of the University of Michigan. * All rights reserved. * * Kendrick Smith <kmsmith@umich.edu> * Andy Adamson <andros@umich.edu> * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include <linux/file.h> #include <linux/slab.h> #include <linux/namei.h> #include <linux/statfs.h> #include <linux/utsname.h> #include <linux/pagemap.h> #include <linux/sunrpc/svcauth_gss.h> #include <linux/sunrpc/addr.h> #include "idmap.h" #include "acl.h" #include "xdr4.h" #include "vfs.h" #include "state.h" #include "cache.h" #include "netns.h" #include "pnfs.h" #include "filecache.h" #ifdef CONFIG_NFSD_V4_SECURITY_LABEL #include <linux/security.h> #endif #define NFSDDBG_FACILITY NFSDDBG_XDR const u32 nfsd_suppattrs[3][3] = { {NFSD4_SUPPORTED_ATTRS_WORD0, NFSD4_SUPPORTED_ATTRS_WORD1, NFSD4_SUPPORTED_ATTRS_WORD2}, {NFSD4_1_SUPPORTED_ATTRS_WORD0, NFSD4_1_SUPPORTED_ATTRS_WORD1, NFSD4_1_SUPPORTED_ATTRS_WORD2}, {NFSD4_1_SUPPORTED_ATTRS_WORD0, NFSD4_1_SUPPORTED_ATTRS_WORD1, NFSD4_2_SUPPORTED_ATTRS_WORD2}, }; /* * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing * directory in order to indicate to the client that a filesystem boundary is present * We use a fixed fsid for a referral */ #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL static __be32 check_filename(char *str, int len) { int i; if (len == 0) return nfserr_inval; if (isdotent(str, len)) return nfserr_badname; for (i = 0; i < len; i++) if (str[i] == '/') return nfserr_badname; return 0; } #define DECODE_HEAD \ __be32 *p; \ __be32 status #define DECODE_TAIL \ status = 0; \ out: \ return status; \ xdr_error: \ dprintk("NFSD: xdr error (%s:%d)\n", \ __FILE__, __LINE__); \ status = nfserr_bad_xdr; \ goto out #define READMEM(x,nbytes) do { \ x = (char *)p; \ p += XDR_QUADLEN(nbytes); \ } while (0) #define SAVEMEM(x,nbytes) do { \ if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ savemem(argp, p, nbytes) : \ (char *)p)) { \ dprintk("NFSD: xdr error (%s:%d)\n", \ __FILE__, __LINE__); \ goto xdr_error; \ } \ p += XDR_QUADLEN(nbytes); \ } while (0) #define COPYMEM(x,nbytes) do { \ memcpy((x), p, nbytes); \ p += XDR_QUADLEN(nbytes); \ } while (0) /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ #define READ_BUF(nbytes) do { \ if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ p = argp->p; \ argp->p += XDR_QUADLEN(nbytes); \ } else if (!(p = read_buf(argp, nbytes))) { \ dprintk("NFSD: xdr error (%s:%d)\n", \ __FILE__, __LINE__); \ goto xdr_error; \ } \ } while (0) static void next_decode_page(struct nfsd4_compoundargs *argp) { argp->p = page_address(argp->pagelist[0]); argp->pagelist++; if (argp->pagelen < PAGE_SIZE) { argp->end = argp->p + XDR_QUADLEN(argp->pagelen); argp->pagelen = 0; } else { argp->end = argp->p + (PAGE_SIZE>>2); argp->pagelen -= PAGE_SIZE; } } static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes) { /* We want more bytes than seem to be available. * Maybe we need a new page, maybe we have just run out */ unsigned int avail = (char *)argp->end - (char *)argp->p; __be32 *p; if (argp->pagelen == 0) { struct kvec *vec = &argp->rqstp->rq_arg.tail[0]; if (!argp->tail) { argp->tail = true; avail = vec->iov_len; argp->p = vec->iov_base; argp->end = vec->iov_base + avail; } if (avail < nbytes) return NULL; p = argp->p; argp->p += XDR_QUADLEN(nbytes); return p; } if (avail + argp->pagelen < nbytes) return NULL; if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ return NULL; /* ok, we can do it with the current plus the next page */ if (nbytes <= sizeof(argp->tmp)) p = argp->tmp; else { kfree(argp->tmpp); p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); if (!p) return NULL; } /* * The following memcpy is safe because read_buf is always * called with nbytes > avail, and the two cases above both * guarantee p points to at least nbytes bytes. */ memcpy(p, argp->p, avail); next_decode_page(argp); memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); argp->p += XDR_QUADLEN(nbytes - avail); return p; } static unsigned int compoundargs_bytes_left(struct nfsd4_compoundargs *argp) { unsigned int this = (char *)argp->end - (char *)argp->p; return this + argp->pagelen; } static int zero_clientid(clientid_t *clid) { return (clid->cl_boot == 0) && (clid->cl_id == 0); } /** * svcxdr_tmpalloc - allocate memory to be freed after compound processing * @argp: NFSv4 compound argument structure * @len: length of buffer to allocate * * Allocates a buffer of size @len to be freed when processing the compound * operation described in @argp finishes. */ static void * svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len) { struct svcxdr_tmpbuf *tb; tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL); if (!tb) return NULL; tb->next = argp->to_free; argp->to_free = tb; return tb->buf; } /* * For xdr strings that need to be passed to other kernel api's * as null-terminated strings. * * Note null-terminating in place usually isn't safe since the * buffer might end on a page boundary. */ static char * svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len) { char *p = svcxdr_tmpalloc(argp, len + 1); if (!p) return NULL; memcpy(p, buf, len); p[len] = '\0'; return p; } /** * savemem - duplicate a chunk of memory for later processing * @argp: NFSv4 compound argument structure to be freed with * @p: pointer to be duplicated * @nbytes: length to be duplicated * * Returns a pointer to a copy of @nbytes bytes of memory at @p * that are preserved until processing of the NFSv4 compound * operation described by @argp finishes. */ static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) { void *ret; ret = svcxdr_tmpalloc(argp, nbytes); if (!ret) return NULL; memcpy(ret, p, nbytes); return ret; } static __be32 nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec64 *tv) { DECODE_HEAD; READ_BUF(12); p = xdr_decode_hyper(p, &tv->tv_sec); tv->tv_nsec = be32_to_cpup(p++); if (tv->tv_nsec >= (u32)1000000000) return nfserr_inval; DECODE_TAIL; } static __be32 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) { u32 bmlen; DECODE_HEAD; bmval[0] = 0; bmval[1] = 0; bmval[2] = 0; READ_BUF(4); bmlen = be32_to_cpup(p++); if (bmlen > 1000) goto xdr_error; READ_BUF(bmlen << 2); if (bmlen > 0) bmval[0] = be32_to_cpup(p++); if (bmlen > 1) bmval[1] = be32_to_cpup(p++); if (bmlen > 2) bmval[2] = be32_to_cpup(p++); DECODE_TAIL; } static __be32 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr, struct nfs4_acl **acl, struct xdr_netobj *label, int *umask) { int expected_len, len = 0; u32 dummy32; char *buf; DECODE_HEAD; iattr->ia_valid = 0; if ((status = nfsd4_decode_bitmap(argp, bmval))) return status; if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) { if (nfsd_attrs_supported(argp->minorversion, bmval)) return nfserr_inval; return nfserr_attrnotsupp; } READ_BUF(4); expected_len = be32_to_cpup(p++); if (bmval[0] & FATTR4_WORD0_SIZE) { READ_BUF(8); len += 8; p = xdr_decode_hyper(p, &iattr->ia_size); iattr->ia_valid |= ATTR_SIZE; } if (bmval[0] & FATTR4_WORD0_ACL) { u32 nace; struct nfs4_ace *ace; READ_BUF(4); len += 4; nace = be32_to_cpup(p++); if (nace > compoundargs_bytes_left(argp)/20) /* * Even with 4-byte names there wouldn't be * space for that many aces; something fishy is * going on: */ return nfserr_fbig; *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace)); if (*acl == NULL) return nfserr_jukebox; (*acl)->naces = nace; for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { READ_BUF(16); len += 16; ace->type = be32_to_cpup(p++); ace->flag = be32_to_cpup(p++); ace->access_mask = be32_to_cpup(p++); dummy32 = be32_to_cpup(p++); READ_BUF(dummy32); len += XDR_QUADLEN(dummy32) << 2; READMEM(buf, dummy32); ace->whotype = nfs4_acl_get_whotype(buf, dummy32); status = nfs_ok; if (ace->whotype != NFS4_ACL_WHO_NAMED) ; else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &ace->who_gid); else status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &ace->who_uid); if (status) return status; } } else *acl = NULL; if (bmval[1] & FATTR4_WORD1_MODE) { READ_BUF(4); len += 4; iattr->ia_mode = be32_to_cpup(p++); iattr->ia_mode &= (S_IFMT | S_IALLUGO); iattr->ia_valid |= ATTR_MODE; } if (bmval[1] & FATTR4_WORD1_OWNER) { READ_BUF(4); len += 4; dummy32 = be32_to_cpup(p++); READ_BUF(dummy32); len += (XDR_QUADLEN(dummy32) << 2); READMEM(buf, dummy32); if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) return status; iattr->ia_valid |= ATTR_UID; } if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { READ_BUF(4); len += 4; dummy32 = be32_to_cpup(p++); READ_BUF(dummy32); len += (XDR_QUADLEN(dummy32) << 2); READMEM(buf, dummy32); if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) return status; iattr->ia_valid |= ATTR_GID; } if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { READ_BUF(4); len += 4; dummy32 = be32_to_cpup(p++); switch (dummy32) { case NFS4_SET_TO_CLIENT_TIME: len += 12; status = nfsd4_decode_time(argp, &iattr->ia_atime); if (status) return status; iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); break; case NFS4_SET_TO_SERVER_TIME: iattr->ia_valid |= ATTR_ATIME; break; default: goto xdr_error; } } if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { READ_BUF(4); len += 4; dummy32 = be32_to_cpup(p++); switch (dummy32) { case NFS4_SET_TO_CLIENT_TIME: len += 12; status = nfsd4_decode_time(argp, &iattr->ia_mtime); if (status) return status; iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); break; case NFS4_SET_TO_SERVER_TIME: iattr->ia_valid |= ATTR_MTIME; break; default: goto xdr_error; } } label->len = 0; if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) && bmval[2] & FATTR4_WORD2_SECURITY_LABEL) { READ_BUF(4); len += 4; dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */ READ_BUF(4); len += 4; dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */ READ_BUF(4); len += 4; dummy32 = be32_to_cpup(p++); READ_BUF(dummy32); if (dummy32 > NFS4_MAXLABELLEN) return nfserr_badlabel; len += (XDR_QUADLEN(dummy32) << 2); READMEM(buf, dummy32); label->len = dummy32; label->data = svcxdr_dupstr(argp, buf, dummy32); if (!label->data) return nfserr_jukebox; } if (bmval[2] & FATTR4_WORD2_MODE_UMASK) { if (!umask) goto xdr_error; READ_BUF(8); len += 8; dummy32 = be32_to_cpup(p++); iattr->ia_mode = dummy32 & (S_IFMT | S_IALLUGO); dummy32 = be32_to_cpup(p++); *umask = dummy32 & S_IRWXUGO; iattr->ia_valid |= ATTR_MODE; } if (len != expected_len) goto xdr_error; DECODE_TAIL; } static __be32 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid) { DECODE_HEAD; READ_BUF(sizeof(stateid_t)); sid->si_generation = be32_to_cpup(p++); COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); DECODE_TAIL; } static __be32 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) { DECODE_HEAD; READ_BUF(4); access->ac_req_access = be32_to_cpup(p++); DECODE_TAIL; } static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs) { DECODE_HEAD; struct user_namespace *userns = nfsd_user_namespace(argp->rqstp); u32 dummy, uid, gid; char *machine_name; int i; int nr_secflavs; /* callback_sec_params4 */ READ_BUF(4); nr_secflavs = be32_to_cpup(p++); if (nr_secflavs) cbs->flavor = (u32)(-1); else /* Is this legal? Be generous, take it to mean AUTH_NONE: */ cbs->flavor = 0; for (i = 0; i < nr_secflavs; ++i) { READ_BUF(4); dummy = be32_to_cpup(p++); switch (dummy) { case RPC_AUTH_NULL: /* Nothing to read */ if (cbs->flavor == (u32)(-1)) cbs->flavor = RPC_AUTH_NULL; break; case RPC_AUTH_UNIX: READ_BUF(8); /* stamp */ dummy = be32_to_cpup(p++); /* machine name */ dummy = be32_to_cpup(p++); READ_BUF(dummy); SAVEMEM(machine_name, dummy); /* uid, gid */ READ_BUF(8); uid = be32_to_cpup(p++); gid = be32_to_cpup(p++); /* more gids */ READ_BUF(4); dummy = be32_to_cpup(p++); READ_BUF(dummy * 4); if (cbs->flavor == (u32)(-1)) { kuid_t kuid = make_kuid(userns, uid); kgid_t kgid = make_kgid(userns, gid); if (uid_valid(kuid) && gid_valid(kgid)) { cbs->uid = kuid; cbs->gid = kgid; cbs->flavor = RPC_AUTH_UNIX; } else { dprintk("RPC_AUTH_UNIX with invalid" "uid or gid ignoring!\n"); } } break; case RPC_AUTH_GSS: dprintk("RPC_AUTH_GSS callback secflavor " "not supported!\n"); READ_BUF(8); /* gcbp_service */ dummy = be32_to_cpup(p++); /* gcbp_handle_from_server */ dummy = be32_to_cpup(p++); READ_BUF(dummy); p += XDR_QUADLEN(dummy); /* gcbp_handle_from_client */ READ_BUF(4); dummy = be32_to_cpup(p++); READ_BUF(dummy); break; default: dprintk("Illegal callback secflavor\n"); return nfserr_inval; } } DECODE_TAIL; } static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc) { DECODE_HEAD; READ_BUF(4); bc->bc_cb_program = be32_to_cpup(p++); nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec); DECODE_TAIL; } static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts) { DECODE_HEAD; READ_BUF(NFS4_MAX_SESSIONID_LEN + 8); COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); bcts->dir = be32_to_cpup(p++); /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker * could help us figure out we should be using it. */ DECODE_TAIL; } static __be32 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) { DECODE_HEAD; READ_BUF(4); close->cl_seqid = be32_to_cpup(p++); return nfsd4_decode_stateid(argp, &close->cl_stateid); DECODE_TAIL; } static __be32 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) { DECODE_HEAD; READ_BUF(12); p = xdr_decode_hyper(p, &commit->co_offset); commit->co_count = be32_to_cpup(p++); DECODE_TAIL; } static __be32 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) { DECODE_HEAD; READ_BUF(4); create->cr_type = be32_to_cpup(p++); switch (create->cr_type) { case NF4LNK: READ_BUF(4); create->cr_datalen = be32_to_cpup(p++); READ_BUF(create->cr_datalen); create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen); if (!create->cr_data) return nfserr_jukebox; break; case NF4BLK: case NF4CHR: READ_BUF(8); create->cr_specdata1 = be32_to_cpup(p++); create->cr_specdata2 = be32_to_cpup(p++); break; case NF4SOCK: case NF4FIFO: case NF4DIR: default: break; } READ_BUF(4); create->cr_namelen = be32_to_cpup(p++); READ_BUF(create->cr_namelen); SAVEMEM(create->cr_name, create->cr_namelen); if ((status = check_filename(create->cr_name, create->cr_namelen))) return status; status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl, &create->cr_label, &create->cr_umask); if (status) goto out; DECODE_TAIL; } static inline __be32 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) { return nfsd4_decode_stateid(argp, &dr->dr_stateid); } static inline __be32 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) { return nfsd4_decode_bitmap(argp, getattr->ga_bmval); } static __be32 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) { DECODE_HEAD; READ_BUF(4); link->li_namelen = be32_to_cpup(p++); READ_BUF(link->li_namelen); SAVEMEM(link->li_name, link->li_namelen); if ((status = check_filename(link->li_name, link->li_namelen))) return status; DECODE_TAIL; } static __be32 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) { DECODE_HEAD; /* * type, reclaim(boolean), offset, length, new_lock_owner(boolean) */ READ_BUF(28); lock->lk_type = be32_to_cpup(p++); if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) goto xdr_error; lock->lk_reclaim = be32_to_cpup(p++); p = xdr_decode_hyper(p, &lock->lk_offset); p = xdr_decode_hyper(p, &lock->lk_length); lock->lk_is_new = be32_to_cpup(p++); if (lock->lk_is_new) { READ_BUF(4); lock->lk_new_open_seqid = be32_to_cpup(p++); status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid); if (status) return status; READ_BUF(8 + sizeof(clientid_t)); lock->lk_new_lock_seqid = be32_to_cpup(p++); COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); lock->lk_new_owner.len = be32_to_cpup(p++); READ_BUF(lock->lk_new_owner.len); READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); } else { status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid); if (status) return status; READ_BUF(4); lock->lk_old_lock_seqid = be32_to_cpup(p++); } DECODE_TAIL; } static __be32 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) { DECODE_HEAD; READ_BUF(32); lockt->lt_type = be32_to_cpup(p++); if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) goto xdr_error; p = xdr_decode_hyper(p, &lockt->lt_offset); p = xdr_decode_hyper(p, &lockt->lt_length); COPYMEM(&lockt->lt_clientid, 8); lockt->lt_owner.len = be32_to_cpup(p++); READ_BUF(lockt->lt_owner.len); READMEM(lockt->lt_owner.data, lockt->lt_owner.len); DECODE_TAIL; } static __be32 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) { DECODE_HEAD; READ_BUF(8); locku->lu_type = be32_to_cpup(p++); if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) goto xdr_error; locku->lu_seqid = be32_to_cpup(p++); status = nfsd4_decode_stateid(argp, &locku->lu_stateid); if (status) return status; READ_BUF(16); p = xdr_decode_hyper(p, &locku->lu_offset); p = xdr_decode_hyper(p, &locku->lu_length); DECODE_TAIL; } static __be32 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) { DECODE_HEAD; READ_BUF(4); lookup->lo_len = be32_to_cpup(p++); READ_BUF(lookup->lo_len); SAVEMEM(lookup->lo_name, lookup->lo_len); if ((status = check_filename(lookup->lo_name, lookup->lo_len))) return status; DECODE_TAIL; } static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when) { __be32 *p; u32 w; READ_BUF(4); w = be32_to_cpup(p++); *share_access = w & NFS4_SHARE_ACCESS_MASK; *deleg_want = w & NFS4_SHARE_WANT_MASK; if (deleg_when) *deleg_when = w & NFS4_SHARE_WHEN_MASK; switch (w & NFS4_SHARE_ACCESS_MASK) { case NFS4_SHARE_ACCESS_READ: case NFS4_SHARE_ACCESS_WRITE: case NFS4_SHARE_ACCESS_BOTH: break; default: return nfserr_bad_xdr; } w &= ~NFS4_SHARE_ACCESS_MASK; if (!w) return nfs_ok; if (!argp->minorversion) return nfserr_bad_xdr; switch (w & NFS4_SHARE_WANT_MASK) { case NFS4_SHARE_WANT_NO_PREFERENCE: case NFS4_SHARE_WANT_READ_DELEG: case NFS4_SHARE_WANT_WRITE_DELEG: case NFS4_SHARE_WANT_ANY_DELEG: case NFS4_SHARE_WANT_NO_DELEG: case NFS4_SHARE_WANT_CANCEL: break; default: return nfserr_bad_xdr; } w &= ~NFS4_SHARE_WANT_MASK; if (!w) return nfs_ok; if (!deleg_when) /* open_downgrade */ return nfserr_inval; switch (w) { case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL: case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED: case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL | NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED): return nfs_ok; } xdr_error: return nfserr_bad_xdr; } static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x) { __be32 *p; READ_BUF(4); *x = be32_to_cpup(p++); /* Note: unlinke access bits, deny bits may be zero. */ if (*x & ~NFS4_SHARE_DENY_BOTH) return nfserr_bad_xdr; return nfs_ok; xdr_error: return nfserr_bad_xdr; } static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o) { __be32 *p; READ_BUF(4); o->len = be32_to_cpup(p++); if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT) return nfserr_bad_xdr; READ_BUF(o->len); SAVEMEM(o->data, o->len); return nfs_ok; xdr_error: return nfserr_bad_xdr; } static __be32 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) { DECODE_HEAD; u32 dummy; memset(open->op_bmval, 0, sizeof(open->op_bmval)); open->op_iattr.ia_valid = 0; open->op_openowner = NULL; open->op_xdr_error = 0; /* seqid, share_access, share_deny, clientid, ownerlen */ READ_BUF(4); open->op_seqid = be32_to_cpup(p++); /* decode, yet ignore deleg_when until supported */ status = nfsd4_decode_share_access(argp, &open->op_share_access, &open->op_deleg_want, &dummy); if (status) goto xdr_error; status = nfsd4_decode_share_deny(argp, &open->op_share_deny); if (status) goto xdr_error; READ_BUF(sizeof(clientid_t)); COPYMEM(&open->op_clientid, sizeof(clientid_t)); status = nfsd4_decode_opaque(argp, &open->op_owner); if (status) goto xdr_error; READ_BUF(4); open->op_create = be32_to_cpup(p++); switch (open->op_create) { case NFS4_OPEN_NOCREATE: break; case NFS4_OPEN_CREATE: READ_BUF(4); open->op_createmode = be32_to_cpup(p++); switch (open->op_createmode) { case NFS4_CREATE_UNCHECKED: case NFS4_CREATE_GUARDED: status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl, &open->op_label, &open->op_umask); if (status) goto out; break; case NFS4_CREATE_EXCLUSIVE: READ_BUF(NFS4_VERIFIER_SIZE); COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); break; case NFS4_CREATE_EXCLUSIVE4_1: if (argp->minorversion < 1) goto xdr_error; READ_BUF(NFS4_VERIFIER_SIZE); COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl, &open->op_label, &open->op_umask); if (status) goto out; break; default: goto xdr_error; } break; default: goto xdr_error; } /* open_claim */ READ_BUF(4); open->op_claim_type = be32_to_cpup(p++); switch (open->op_claim_type) { case NFS4_OPEN_CLAIM_NULL: case NFS4_OPEN_CLAIM_DELEGATE_PREV: READ_BUF(4); open->op_fname.len = be32_to_cpup(p++); READ_BUF(open->op_fname.len); SAVEMEM(open->op_fname.data, open->op_fname.len); if ((status = check_filename(open->op_fname.data, open->op_fname.len))) return status; break; case NFS4_OPEN_CLAIM_PREVIOUS: READ_BUF(4); open->op_delegate_type = be32_to_cpup(p++); break; case NFS4_OPEN_CLAIM_DELEGATE_CUR: status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); if (status) return status; READ_BUF(4); open->op_fname.len = be32_to_cpup(p++); READ_BUF(open->op_fname.len); SAVEMEM(open->op_fname.data, open->op_fname.len); if ((status = check_filename(open->op_fname.data, open->op_fname.len))) return status; break; case NFS4_OPEN_CLAIM_FH: case NFS4_OPEN_CLAIM_DELEG_PREV_FH: if (argp->minorversion < 1) goto xdr_error; /* void */ break; case NFS4_OPEN_CLAIM_DELEG_CUR_FH: if (argp->minorversion < 1) goto xdr_error; status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); if (status) return status; break; default: goto xdr_error; } DECODE_TAIL; } static __be32 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) { DECODE_HEAD; if (argp->minorversion >= 1) return nfserr_notsupp; status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid); if (status) return status; READ_BUF(4); open_conf->oc_seqid = be32_to_cpup(p++); DECODE_TAIL; } static __be32 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) { DECODE_HEAD; status = nfsd4_decode_stateid(argp, &open_down->od_stateid); if (status) return status; READ_BUF(4); open_down->od_seqid = be32_to_cpup(p++); status = nfsd4_decode_share_access(argp, &open_down->od_share_access, &open_down->od_deleg_want, NULL); if (status) return status; status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny); if (status) return status; DECODE_TAIL; } static __be32 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) { DECODE_HEAD; READ_BUF(4); putfh->pf_fhlen = be32_to_cpup(p++); if (putfh->pf_fhlen > NFS4_FHSIZE) goto xdr_error; READ_BUF(putfh->pf_fhlen); SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); DECODE_TAIL; } static __be32 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p) { if (argp->minorversion == 0) return nfs_ok; return nfserr_notsupp; } static __be32 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) { DECODE_HEAD; status = nfsd4_decode_stateid(argp, &read->rd_stateid); if (status) return status; READ_BUF(12); p = xdr_decode_hyper(p, &read->rd_offset); read->rd_length = be32_to_cpup(p++); DECODE_TAIL; } static __be32 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) { DECODE_HEAD; READ_BUF(24); p = xdr_decode_hyper(p, &readdir->rd_cookie); COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); readdir->rd_dircount = be32_to_cpup(p++); readdir->rd_maxcount = be32_to_cpup(p++); if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) goto out; DECODE_TAIL; } static __be32 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) { DECODE_HEAD; READ_BUF(4); remove->rm_namelen = be32_to_cpup(p++); READ_BUF(remove->rm_namelen); SAVEMEM(remove->rm_name, remove->rm_namelen); if ((status = check_filename(remove->rm_name, remove->rm_namelen))) return status; DECODE_TAIL; } static __be32 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) { DECODE_HEAD; READ_BUF(4); rename->rn_snamelen = be32_to_cpup(p++); READ_BUF(rename->rn_snamelen); SAVEMEM(rename->rn_sname, rename->rn_snamelen); READ_BUF(4); rename->rn_tnamelen = be32_to_cpup(p++); READ_BUF(rename->rn_tnamelen); SAVEMEM(rename->rn_tname, rename->rn_tnamelen); if ((status = check_filename(rename->rn_sname, rename->rn_snamelen))) return status; if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen))) return status; DECODE_TAIL; } static __be32 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) { DECODE_HEAD; if (argp->minorversion >= 1) return nfserr_notsupp; READ_BUF(sizeof(clientid_t)); COPYMEM(clientid, sizeof(clientid_t)); DECODE_TAIL; } static __be32 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, struct nfsd4_secinfo *secinfo) { DECODE_HEAD; READ_BUF(4); secinfo->si_namelen = be32_to_cpup(p++); READ_BUF(secinfo->si_namelen); SAVEMEM(secinfo->si_name, secinfo->si_namelen); status = check_filename(secinfo->si_name, secinfo->si_namelen); if (status) return status; DECODE_TAIL; } static __be32 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, struct nfsd4_secinfo_no_name *sin) { DECODE_HEAD; READ_BUF(4); sin->sin_style = be32_to_cpup(p++); DECODE_TAIL; } static __be32 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) { __be32 status; status = nfsd4_decode_stateid(argp, &setattr->sa_stateid); if (status) return status; return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl, &setattr->sa_label, NULL); } static __be32 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) { DECODE_HEAD; if (argp->minorversion >= 1) return nfserr_notsupp; READ_BUF(NFS4_VERIFIER_SIZE); COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE); status = nfsd4_decode_opaque(argp, &setclientid->se_name); if (status) return nfserr_bad_xdr; READ_BUF(8); setclientid->se_callback_prog = be32_to_cpup(p++); setclientid->se_callback_netid_len = be32_to_cpup(p++); READ_BUF(setclientid->se_callback_netid_len); SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); READ_BUF(4); setclientid->se_callback_addr_len = be32_to_cpup(p++); READ_BUF(setclientid->se_callback_addr_len); SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); READ_BUF(4); setclientid->se_callback_ident = be32_to_cpup(p++); DECODE_TAIL; } static __be32 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) { DECODE_HEAD; if (argp->minorversion >= 1) return nfserr_notsupp; READ_BUF(8 + NFS4_VERIFIER_SIZE); COPYMEM(&scd_c->sc_clientid, 8); COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE); DECODE_TAIL; } /* Also used for NVERIFY */ static __be32 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) { DECODE_HEAD; if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) goto out; /* For convenience's sake, we compare raw xdr'd attributes in * nfsd4_proc_verify */ READ_BUF(4); verify->ve_attrlen = be32_to_cpup(p++); READ_BUF(verify->ve_attrlen); SAVEMEM(verify->ve_attrval, verify->ve_attrlen); DECODE_TAIL; } static __be32 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) { int avail; int len; DECODE_HEAD; status = nfsd4_decode_stateid(argp, &write->wr_stateid); if (status) return status; READ_BUF(16); p = xdr_decode_hyper(p, &write->wr_offset); write->wr_stable_how = be32_to_cpup(p++); if (write->wr_stable_how > NFS_FILE_SYNC) goto xdr_error; write->wr_buflen = be32_to_cpup(p++); /* Sorry .. no magic macros for this.. * * READ_BUF(write->wr_buflen); * SAVEMEM(write->wr_buf, write->wr_buflen); */ avail = (char*)argp->end - (char*)argp->p; if (avail + argp->pagelen < write->wr_buflen) { dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__); goto xdr_error; } write->wr_head.iov_base = p; write->wr_head.iov_len = avail; write->wr_pagelist = argp->pagelist; len = XDR_QUADLEN(write->wr_buflen) << 2; if (len >= avail) { int pages; len -= avail; pages = len >> PAGE_SHIFT; argp->pagelist += pages; argp->pagelen -= pages * PAGE_SIZE; len -= pages * PAGE_SIZE; next_decode_page(argp); } argp->p += XDR_QUADLEN(len); DECODE_TAIL; } static __be32 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) { DECODE_HEAD; if (argp->minorversion >= 1) return nfserr_notsupp; READ_BUF(12); COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); rlockowner->rl_owner.len = be32_to_cpup(p++); READ_BUF(rlockowner->rl_owner.len); READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) return nfserr_inval; DECODE_TAIL; } static __be32 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, struct nfsd4_exchange_id *exid) { int dummy, tmp; DECODE_HEAD; READ_BUF(NFS4_VERIFIER_SIZE); COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE); status = nfsd4_decode_opaque(argp, &exid->clname); if (status) return nfserr_bad_xdr; READ_BUF(4); exid->flags = be32_to_cpup(p++); /* Ignore state_protect4_a */ READ_BUF(4); exid->spa_how = be32_to_cpup(p++); switch (exid->spa_how) { case SP4_NONE: break; case SP4_MACH_CRED: /* spo_must_enforce */ status = nfsd4_decode_bitmap(argp, exid->spo_must_enforce); if (status) goto out; /* spo_must_allow */ status = nfsd4_decode_bitmap(argp, exid->spo_must_allow); if (status) goto out; break; case SP4_SSV: /* ssp_ops */ READ_BUF(4); dummy = be32_to_cpup(p++); READ_BUF(dummy * 4); p += dummy; READ_BUF(4); dummy = be32_to_cpup(p++); READ_BUF(dummy * 4); p += dummy; /* ssp_hash_algs<> */ READ_BUF(4); tmp = be32_to_cpup(p++); while (tmp--) { READ_BUF(4); dummy = be32_to_cpup(p++); READ_BUF(dummy); p += XDR_QUADLEN(dummy); } /* ssp_encr_algs<> */ READ_BUF(4); tmp = be32_to_cpup(p++); while (tmp--) { READ_BUF(4); dummy = be32_to_cpup(p++); READ_BUF(dummy); p += XDR_QUADLEN(dummy); } /* ignore ssp_window and ssp_num_gss_handles: */ READ_BUF(8); break; default: goto xdr_error; } READ_BUF(4); /* nfs_impl_id4 array length */ dummy = be32_to_cpup(p++); if (dummy > 1) goto xdr_error; if (dummy == 1) { status = nfsd4_decode_opaque(argp, &exid->nii_domain); if (status) goto xdr_error; /* nii_name */ status = nfsd4_decode_opaque(argp, &exid->nii_name); if (status) goto xdr_error; /* nii_date */ status = nfsd4_decode_time(argp, &exid->nii_time); if (status) goto xdr_error; } DECODE_TAIL; } static __be32 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, struct nfsd4_create_session *sess) { DECODE_HEAD; READ_BUF(16); COPYMEM(&sess->clientid, 8); sess->seqid = be32_to_cpup(p++); sess->flags = be32_to_cpup(p++); /* Fore channel attrs */ READ_BUF(28); p++; /* headerpadsz is always 0 */ sess->fore_channel.maxreq_sz = be32_to_cpup(p++); sess->fore_channel.maxresp_sz = be32_to_cpup(p++); sess->fore_channel.maxresp_cached = be32_to_cpup(p++); sess->fore_channel.maxops = be32_to_cpup(p++); sess->fore_channel.maxreqs = be32_to_cpup(p++); sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++); if (sess->fore_channel.nr_rdma_attrs == 1) { READ_BUF(4); sess->fore_channel.rdma_attrs = be32_to_cpup(p++); } else if (sess->fore_channel.nr_rdma_attrs > 1) { dprintk("Too many fore channel attr bitmaps!\n"); goto xdr_error; } /* Back channel attrs */ READ_BUF(28); p++; /* headerpadsz is always 0 */ sess->back_channel.maxreq_sz = be32_to_cpup(p++); sess->back_channel.maxresp_sz = be32_to_cpup(p++); sess->back_channel.maxresp_cached = be32_to_cpup(p++); sess->back_channel.maxops = be32_to_cpup(p++); sess->back_channel.maxreqs = be32_to_cpup(p++); sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++); if (sess->back_channel.nr_rdma_attrs == 1) { READ_BUF(4); sess->back_channel.rdma_attrs = be32_to_cpup(p++); } else if (sess->back_channel.nr_rdma_attrs > 1) { dprintk("Too many back channel attr bitmaps!\n"); goto xdr_error; } READ_BUF(4); sess->callback_prog = be32_to_cpup(p++); nfsd4_decode_cb_sec(argp, &sess->cb_sec); DECODE_TAIL; } static __be32 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_session *destroy_session) { DECODE_HEAD; READ_BUF(NFS4_MAX_SESSIONID_LEN); COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN); DECODE_TAIL; } static __be32 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_free_stateid *free_stateid) { DECODE_HEAD; READ_BUF(sizeof(stateid_t)); free_stateid->fr_stateid.si_generation = be32_to_cpup(p++); COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t)); DECODE_TAIL; } static __be32 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, struct nfsd4_sequence *seq) { DECODE_HEAD; READ_BUF(NFS4_MAX_SESSIONID_LEN + 16); COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); seq->seqid = be32_to_cpup(p++); seq->slotid = be32_to_cpup(p++); seq->maxslots = be32_to_cpup(p++); seq->cachethis = be32_to_cpup(p++); DECODE_TAIL; } static __be32 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid) { int i; __be32 *p, status; struct nfsd4_test_stateid_id *stateid; READ_BUF(4); test_stateid->ts_num_ids = ntohl(*p++); INIT_LIST_HEAD(&test_stateid->ts_stateid_list); for (i = 0; i < test_stateid->ts_num_ids; i++) { stateid = svcxdr_tmpalloc(argp, sizeof(*stateid)); if (!stateid) { status = nfserrno(-ENOMEM); goto out; } INIT_LIST_HEAD(&stateid->ts_id_list); list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list); status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid); if (status) goto out; } status = 0; out: return status; xdr_error: dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__); status = nfserr_bad_xdr; goto out; } static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc) { DECODE_HEAD; READ_BUF(8); COPYMEM(&dc->clientid, 8); DECODE_TAIL; } static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc) { DECODE_HEAD; READ_BUF(4); rc->rca_one_fs = be32_to_cpup(p++); DECODE_TAIL; } #ifdef CONFIG_NFSD_PNFS static __be32 nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp, struct nfsd4_getdeviceinfo *gdev) { DECODE_HEAD; u32 num, i; READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4); COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid)); gdev->gd_layout_type = be32_to_cpup(p++); gdev->gd_maxcount = be32_to_cpup(p++); num = be32_to_cpup(p++); if (num) { if (num > 1000) goto xdr_error; READ_BUF(4 * num); gdev->gd_notify_types = be32_to_cpup(p++); for (i = 1; i < num; i++) { if (be32_to_cpup(p++)) { status = nfserr_inval; goto out; } } } DECODE_TAIL; } static __be32 nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp, struct nfsd4_layoutget *lgp) { DECODE_HEAD; READ_BUF(36); lgp->lg_signal = be32_to_cpup(p++); lgp->lg_layout_type = be32_to_cpup(p++); lgp->lg_seg.iomode = be32_to_cpup(p++); p = xdr_decode_hyper(p, &lgp->lg_seg.offset); p = xdr_decode_hyper(p, &lgp->lg_seg.length); p = xdr_decode_hyper(p, &lgp->lg_minlength); status = nfsd4_decode_stateid(argp, &lgp->lg_sid); if (status) return status; READ_BUF(4); lgp->lg_maxcount = be32_to_cpup(p++); DECODE_TAIL; } static __be32 nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp, struct nfsd4_layoutcommit *lcp) { DECODE_HEAD; u32 timechange; READ_BUF(20); p = xdr_decode_hyper(p, &lcp->lc_seg.offset); p = xdr_decode_hyper(p, &lcp->lc_seg.length); lcp->lc_reclaim = be32_to_cpup(p++); status = nfsd4_decode_stateid(argp, &lcp->lc_sid); if (status) return status; READ_BUF(4); lcp->lc_newoffset = be32_to_cpup(p++); if (lcp->lc_newoffset) { READ_BUF(8); p = xdr_decode_hyper(p, &lcp->lc_last_wr); } else lcp->lc_last_wr = 0; READ_BUF(4); timechange = be32_to_cpup(p++); if (timechange) { status = nfsd4_decode_time(argp, &lcp->lc_mtime); if (status) return status; } else { lcp->lc_mtime.tv_nsec = UTIME_NOW; } READ_BUF(8); lcp->lc_layout_type = be32_to_cpup(p++); /* * Save the layout update in XDR format and let the layout driver deal * with it later. */ lcp->lc_up_len = be32_to_cpup(p++); if (lcp->lc_up_len > 0) { READ_BUF(lcp->lc_up_len); READMEM(lcp->lc_up_layout, lcp->lc_up_len); } DECODE_TAIL; } static __be32 nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp, struct nfsd4_layoutreturn *lrp) { DECODE_HEAD; READ_BUF(16); lrp->lr_reclaim = be32_to_cpup(p++); lrp->lr_layout_type = be32_to_cpup(p++); lrp->lr_seg.iomode = be32_to_cpup(p++); lrp->lr_return_type = be32_to_cpup(p++); if (lrp->lr_return_type == RETURN_FILE) { READ_BUF(16); p = xdr_decode_hyper(p, &lrp->lr_seg.offset); p = xdr_decode_hyper(p, &lrp->lr_seg.length); status = nfsd4_decode_stateid(argp, &lrp->lr_sid); if (status) return status; READ_BUF(4); lrp->lrf_body_len = be32_to_cpup(p++); if (lrp->lrf_body_len > 0) { READ_BUF(lrp->lrf_body_len); READMEM(lrp->lrf_body, lrp->lrf_body_len); } } else { lrp->lr_seg.offset = 0; lrp->lr_seg.length = NFS4_MAX_UINT64; } DECODE_TAIL; } #endif /* CONFIG_NFSD_PNFS */ static __be32 nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp, struct nfsd4_fallocate *fallocate) { DECODE_HEAD; status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid); if (status) return status; READ_BUF(16); p = xdr_decode_hyper(p, &fallocate->falloc_offset); xdr_decode_hyper(p, &fallocate->falloc_length); DECODE_TAIL; } static __be32 nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone) { DECODE_HEAD; status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid); if (status) return status; status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid); if (status) return status; READ_BUF(8 + 8 + 8); p = xdr_decode_hyper(p, &clone->cl_src_pos); p = xdr_decode_hyper(p, &clone->cl_dst_pos); p = xdr_decode_hyper(p, &clone->cl_count); DECODE_TAIL; } static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp, struct nl4_server *ns) { DECODE_HEAD; struct nfs42_netaddr *naddr; READ_BUF(4); ns->nl4_type = be32_to_cpup(p++); /* currently support for 1 inter-server source server */ switch (ns->nl4_type) { case NL4_NETADDR: naddr = &ns->u.nl4_addr; READ_BUF(4); naddr->netid_len = be32_to_cpup(p++); if (naddr->netid_len > RPCBIND_MAXNETIDLEN) goto xdr_error; READ_BUF(naddr->netid_len + 4); /* 4 for uaddr len */ COPYMEM(naddr->netid, naddr->netid_len); naddr->addr_len = be32_to_cpup(p++); if (naddr->addr_len > RPCBIND_MAXUADDRLEN) goto xdr_error; READ_BUF(naddr->addr_len); COPYMEM(naddr->addr, naddr->addr_len); break; default: goto xdr_error; } DECODE_TAIL; } static __be32 nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy) { DECODE_HEAD; struct nl4_server *ns_dummy; int i, count; status = nfsd4_decode_stateid(argp, ©->cp_src_stateid); if (status) return status; status = nfsd4_decode_stateid(argp, ©->cp_dst_stateid); if (status) return status; READ_BUF(8 + 8 + 8 + 4 + 4 + 4); p = xdr_decode_hyper(p, ©->cp_src_pos); p = xdr_decode_hyper(p, ©->cp_dst_pos); p = xdr_decode_hyper(p, ©->cp_count); p++; /* ca_consecutive: we always do consecutive copies */ copy->cp_synchronous = be32_to_cpup(p++); count = be32_to_cpup(p++); copy->cp_intra = false; if (count == 0) { /* intra-server copy */ copy->cp_intra = true; goto intra; } /* decode all the supplied server addresses but use first */ status = nfsd4_decode_nl4_server(argp, ©->cp_src); if (status) return status; ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL); if (ns_dummy == NULL) return nfserrno(-ENOMEM); for (i = 0; i < count - 1; i++) { status = nfsd4_decode_nl4_server(argp, ns_dummy); if (status) { kfree(ns_dummy); return status; } } kfree(ns_dummy); intra: DECODE_TAIL; } static __be32 nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp, struct nfsd4_offload_status *os) { return nfsd4_decode_stateid(argp, &os->stateid); } static __be32 nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp, struct nfsd4_copy_notify *cn) { int status; status = nfsd4_decode_stateid(argp, &cn->cpn_src_stateid); if (status) return status; return nfsd4_decode_nl4_server(argp, &cn->cpn_dst); } static __be32 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek) { DECODE_HEAD; status = nfsd4_decode_stateid(argp, &seek->seek_stateid); if (status) return status; READ_BUF(8 + 4); p = xdr_decode_hyper(p, &seek->seek_offset); seek->seek_whence = be32_to_cpup(p); DECODE_TAIL; } static __be32 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) { return nfs_ok; } static __be32 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) { return nfserr_notsupp; } typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); static const nfsd4_dec nfsd4_dec_ops[] = { [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh, [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, [OP_READ] = (nfsd4_dec)nfsd4_decode_read, [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, /* new operations for NFSv4.1 */ [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl, [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session, [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid, [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, #ifdef CONFIG_NFSD_PNFS [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo, [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit, [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget, [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn, #else [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, #endif [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name, [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid, [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid, [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete, /* new operations for NFSv4.2 */ [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy, [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_copy_notify, [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_offload_status, [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_offload_status, [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek, [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone, }; static inline bool nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op) { if (op->opnum < FIRST_NFS4_OP) return false; else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP) return false; else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP) return false; else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP) return false; return true; } static __be32 nfsd4_decode_compound(struct nfsd4_compoundargs *argp) { DECODE_HEAD; struct nfsd4_op *op; bool cachethis = false; int auth_slack= argp->rqstp->rq_auth_slack; int max_reply = auth_slack + 8; /* opcnt, status */ int readcount = 0; int readbytes = 0; int i; READ_BUF(4); argp->taglen = be32_to_cpup(p++); READ_BUF(argp->taglen); SAVEMEM(argp->tag, argp->taglen); READ_BUF(8); argp->minorversion = be32_to_cpup(p++); argp->opcnt = be32_to_cpup(p++); max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2); if (argp->taglen > NFSD4_MAX_TAGLEN) goto xdr_error; /* * NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS * here, so we return success at the xdr level so that * nfsd4_proc can handle this is an NFS-level error. */ if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND) return 0; if (argp->opcnt > ARRAY_SIZE(argp->iops)) { argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); if (!argp->ops) { argp->ops = argp->iops; dprintk("nfsd: couldn't allocate room for COMPOUND\n"); goto xdr_error; } } if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION) argp->opcnt = 0; for (i = 0; i < argp->opcnt; i++) { op = &argp->ops[i]; op->replay = NULL; READ_BUF(4); op->opnum = be32_to_cpup(p++); if (nfsd4_opnum_in_range(argp, op)) op->status = nfsd4_dec_ops[op->opnum](argp, &op->u); else { op->opnum = OP_ILLEGAL; op->status = nfserr_op_illegal; } op->opdesc = OPDESC(op); /* * We'll try to cache the result in the DRC if any one * op in the compound wants to be cached: */ cachethis |= nfsd4_cache_this_op(op); if (op->opnum == OP_READ) { readcount++; readbytes += nfsd4_max_reply(argp->rqstp, op); } else max_reply += nfsd4_max_reply(argp->rqstp, op); /* * OP_LOCK and OP_LOCKT may return a conflicting lock. * (Special case because it will just skip encoding this * if it runs out of xdr buffer space, and it is the only * operation that behaves this way.) */ if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT) max_reply += NFS4_OPAQUE_LIMIT; if (op->status) { argp->opcnt = i+1; break; } } /* Sessions make the DRC unnecessary: */ if (argp->minorversion) cachethis = false; svc_reserve(argp->rqstp, max_reply + readbytes); argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE; if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack) clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags); DECODE_TAIL; } static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode, struct svc_export *exp) { if (exp->ex_flags & NFSEXP_V4ROOT) { *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time)); *p++ = 0; } else if (IS_I_VERSION(inode)) { p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode)); } else { *p++ = cpu_to_be32(stat->ctime.tv_sec); *p++ = cpu_to_be32(stat->ctime.tv_nsec); } return p; } /* * ctime (in NFSv4, time_metadata) is not writeable, and the client * doesn't really care what resolution could theoretically be stored by * the filesystem. * * The client cares how close together changes can be while still * guaranteeing ctime changes. For most filesystems (which have * timestamps with nanosecond fields) that is limited by the resolution * of the time returned from current_time() (which I'm assuming to be * 1/HZ). */ static __be32 *encode_time_delta(__be32 *p, struct inode *inode) { struct timespec64 ts; u32 ns; ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran); ts = ns_to_timespec64(ns); p = xdr_encode_hyper(p, ts.tv_sec); *p++ = cpu_to_be32(ts.tv_nsec); return p; } static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c) { *p++ = cpu_to_be32(c->atomic); if (c->change_supported) { p = xdr_encode_hyper(p, c->before_change); p = xdr_encode_hyper(p, c->after_change); } else { *p++ = cpu_to_be32(c->before_ctime_sec); *p++ = cpu_to_be32(c->before_ctime_nsec); *p++ = cpu_to_be32(c->after_ctime_sec); *p++ = cpu_to_be32(c->after_ctime_nsec); } return p; } /* Encode as an array of strings the string given with components * separated @sep, escaped with esc_enter and esc_exit. */ static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep, char *components, char esc_enter, char esc_exit) { __be32 *p; __be32 pathlen; int pathlen_offset; int strlen, count=0; char *str, *end, *next; dprintk("nfsd4_encode_components(%s)\n", components); pathlen_offset = xdr->buf->len; p = xdr_reserve_space(xdr, 4); if (!p) return nfserr_resource; p++; /* We will fill this in with @count later */ end = str = components; while (*end) { bool found_esc = false; /* try to parse as esc_start, ..., esc_end, sep */ if (*str == esc_enter) { for (; *end && (*end != esc_exit); end++) /* find esc_exit or end of string */; next = end + 1; if (*end && (!*next || *next == sep)) { str++; found_esc = true; } } if (!found_esc) for (; *end && (*end != sep); end++) /* find sep or end of string */; strlen = end - str; if (strlen) { p = xdr_reserve_space(xdr, strlen + 4); if (!p) return nfserr_resource; p = xdr_encode_opaque(p, str, strlen); count++; } else end++; if (found_esc) end = next; str = end; } pathlen = htonl(count); write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4); return 0; } /* Encode as an array of strings the string given with components * separated @sep. */ static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep, char *components) { return nfsd4_encode_components_esc(xdr, sep, components, 0, 0); } /* * encode a location element of a fs_locations structure */ static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr, struct nfsd4_fs_location *location) { __be32 status; status = nfsd4_encode_components_esc(xdr, ':', location->hosts, '[', ']'); if (status) return status; status = nfsd4_encode_components(xdr, '/', location->path); if (status) return status; return 0; } /* * Encode a path in RFC3530 'pathname4' format */ static __be32 nfsd4_encode_path(struct xdr_stream *xdr, const struct path *root, const struct path *path) { struct path cur = *path; __be32 *p; struct dentry **components = NULL; unsigned int ncomponents = 0; __be32 err = nfserr_jukebox; dprintk("nfsd4_encode_components("); path_get(&cur); /* First walk the path up to the nfsd root, and store the * dentries/path components in an array. */ for (;;) { if (path_equal(&cur, root)) break; if (cur.dentry == cur.mnt->mnt_root) { if (follow_up(&cur)) continue; goto out_free; } if ((ncomponents & 15) == 0) { struct dentry **new; new = krealloc(components, sizeof(*new) * (ncomponents + 16), GFP_KERNEL); if (!new) goto out_free; components = new; } components[ncomponents++] = cur.dentry; cur.dentry = dget_parent(cur.dentry); } err = nfserr_resource; p = xdr_reserve_space(xdr, 4); if (!p) goto out_free; *p++ = cpu_to_be32(ncomponents); while (ncomponents) { struct dentry *dentry = components[ncomponents - 1]; unsigned int len; spin_lock(&dentry->d_lock); len = dentry->d_name.len; p = xdr_reserve_space(xdr, len + 4); if (!p) { spin_unlock(&dentry->d_lock); goto out_free; } p = xdr_encode_opaque(p, dentry->d_name.name, len); dprintk("/%pd", dentry); spin_unlock(&dentry->d_lock); dput(dentry); ncomponents--; } err = 0; out_free: dprintk(")\n"); while (ncomponents) dput(components[--ncomponents]); kfree(components); path_put(&cur); return err; } static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr, struct svc_rqst *rqstp, const struct path *path) { struct svc_export *exp_ps; __be32 res; exp_ps = rqst_find_fsidzero_export(rqstp); if (IS_ERR(exp_ps)) return nfserrno(PTR_ERR(exp_ps)); res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path); exp_put(exp_ps); return res; } /* * encode a fs_locations structure */ static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr, struct svc_rqst *rqstp, struct svc_export *exp) { __be32 status; int i; __be32 *p; struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path); if (status) return status; p = xdr_reserve_space(xdr, 4); if (!p) return nfserr_resource; *p++ = cpu_to_be32(fslocs->locations_count); for (i=0; i<fslocs->locations_count; i++) { status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]); if (status) return status; } return 0; } static u32 nfs4_file_type(umode_t mode) { switch (mode & S_IFMT) { case S_IFIFO: return NF4FIFO; case S_IFCHR: return NF4CHR; case S_IFDIR: return NF4DIR; case S_IFBLK: return NF4BLK; case S_IFLNK: return NF4LNK; case S_IFREG: return NF4REG; case S_IFSOCK: return NF4SOCK; default: return NF4BAD; }; } static inline __be32 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp, struct nfs4_ace *ace) { if (ace->whotype != NFS4_ACL_WHO_NAMED) return nfs4_acl_write_who(xdr, ace->whotype); else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) return nfsd4_encode_group(xdr, rqstp, ace->who_gid); else return nfsd4_encode_user(xdr, rqstp, ace->who_uid); } static inline __be32 nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types) { __be32 *p; unsigned long i = hweight_long(layout_types); p = xdr_reserve_space(xdr, 4 + 4 * i); if (!p) return nfserr_resource; *p++ = cpu_to_be32(i); for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i) if (layout_types & (1 << i)) *p++ = cpu_to_be32(i); return 0; } #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ FATTR4_WORD0_RDATTR_ERROR) #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID #define WORD2_ABSENT_FS_ATTRS 0 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL static inline __be32 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, void *context, int len) { __be32 *p; p = xdr_reserve_space(xdr, len + 4 + 4 + 4); if (!p) return nfserr_resource; /* * For now we use a 0 here to indicate the null translation; in * the future we may place a call to translation code here. */ *p++ = cpu_to_be32(0); /* lfs */ *p++ = cpu_to_be32(0); /* pi */ p = xdr_encode_opaque(p, context, len); return 0; } #else static inline __be32 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, void *context, int len) { return 0; } #endif static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err) { /* As per referral draft: */ if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || *bmval0 & FATTR4_WORD0_FS_LOCATIONS) *rdattr_err = NFSERR_MOVED; else return nfserr_moved; } *bmval0 &= WORD0_ABSENT_FS_ATTRS; *bmval1 &= WORD1_ABSENT_FS_ATTRS; *bmval2 &= WORD2_ABSENT_FS_ATTRS; return 0; } static int get_parent_attributes(struct svc_export *exp, struct kstat *stat) { struct path path = exp->ex_path; int err; path_get(&path); while (follow_up(&path)) { if (path.dentry != path.mnt->mnt_root) break; } err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); path_put(&path); return err; } static __be32 nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2) { __be32 *p; if (bmval2) { p = xdr_reserve_space(xdr, 16); if (!p) goto out_resource; *p++ = cpu_to_be32(3); *p++ = cpu_to_be32(bmval0); *p++ = cpu_to_be32(bmval1); *p++ = cpu_to_be32(bmval2); } else if (bmval1) { p = xdr_reserve_space(xdr, 12); if (!p) goto out_resource; *p++ = cpu_to_be32(2); *p++ = cpu_to_be32(bmval0); *p++ = cpu_to_be32(bmval1); } else { p = xdr_reserve_space(xdr, 8); if (!p) goto out_resource; *p++ = cpu_to_be32(1); *p++ = cpu_to_be32(bmval0); } return 0; out_resource: return nfserr_resource; } /* * Note: @fhp can be NULL; in this case, we might have to compose the filehandle * ourselves. */ static __be32 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry, u32 *bmval, struct svc_rqst *rqstp, int ignore_crossmnt) { u32 bmval0 = bmval[0]; u32 bmval1 = bmval[1]; u32 bmval2 = bmval[2]; struct kstat stat; struct svc_fh *tempfh = NULL; struct kstatfs statfs; __be32 *p; int starting_len = xdr->buf->len; int attrlen_offset; __be32 attrlen; u32 dummy; u64 dummy64; u32 rdattr_err = 0; __be32 status; int err; struct nfs4_acl *acl = NULL; #ifdef CONFIG_NFSD_V4_SECURITY_LABEL void *context = NULL; int contextlen; #endif bool contextsupport = false; struct nfsd4_compoundres *resp = rqstp->rq_resp; u32 minorversion = resp->cstate.minorversion; struct path path = { .mnt = exp->ex_path.mnt, .dentry = dentry, }; struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); BUG_ON(!nfsd_attrs_supported(minorversion, bmval)); if (exp->ex_fslocs.migrated) { status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err); if (status) goto out; } err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); if (err) goto out_nfserr; if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) || (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL))) { err = vfs_statfs(&path, &statfs); if (err) goto out_nfserr; } if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); status = nfserr_jukebox; if (!tempfh) goto out; fh_init(tempfh, NFS4_FHSIZE); status = fh_compose(tempfh, exp, dentry, NULL); if (status) goto out; fhp = tempfh; } if (bmval0 & FATTR4_WORD0_ACL) { err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); if (err == -EOPNOTSUPP) bmval0 &= ~FATTR4_WORD0_ACL; else if (err == -EINVAL) { status = nfserr_attrnotsupp; goto out; } else if (err != 0) goto out_nfserr; } #ifdef CONFIG_NFSD_V4_SECURITY_LABEL if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) || bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { if (exp->ex_flags & NFSEXP_SECURITY_LABEL) err = security_inode_getsecctx(d_inode(dentry), &context, &contextlen); else err = -EOPNOTSUPP; contextsupport = (err == 0); if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { if (err == -EOPNOTSUPP) bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL; else if (err) goto out_nfserr; } } #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2); if (status) goto out; attrlen_offset = xdr->buf->len; p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; p++; /* to be backfilled later */ if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { u32 supp[3]; memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp)); if (!IS_POSIXACL(dentry->d_inode)) supp[0] &= ~FATTR4_WORD0_ACL; if (!contextsupport) supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL; if (!supp[2]) { p = xdr_reserve_space(xdr, 12); if (!p) goto out_resource; *p++ = cpu_to_be32(2); *p++ = cpu_to_be32(supp[0]); *p++ = cpu_to_be32(supp[1]); } else { p = xdr_reserve_space(xdr, 16); if (!p) goto out_resource; *p++ = cpu_to_be32(3); *p++ = cpu_to_be32(supp[0]); *p++ = cpu_to_be32(supp[1]); *p++ = cpu_to_be32(supp[2]); } } if (bmval0 & FATTR4_WORD0_TYPE) { p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; dummy = nfs4_file_type(stat.mode); if (dummy == NF4BAD) { status = nfserr_serverfault; goto out; } *p++ = cpu_to_be32(dummy); } if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) *p++ = cpu_to_be32(NFS4_FH_PERSISTENT); else *p++ = cpu_to_be32(NFS4_FH_PERSISTENT| NFS4_FH_VOL_RENAME); } if (bmval0 & FATTR4_WORD0_CHANGE) { p = xdr_reserve_space(xdr, 8); if (!p) goto out_resource; p = encode_change(p, &stat, d_inode(dentry), exp); } if (bmval0 & FATTR4_WORD0_SIZE) { p = xdr_reserve_space(xdr, 8); if (!p) goto out_resource; p = xdr_encode_hyper(p, stat.size); } if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; *p++ = cpu_to_be32(1); } if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; *p++ = cpu_to_be32(1); } if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; *p++ = cpu_to_be32(0); } if (bmval0 & FATTR4_WORD0_FSID) { p = xdr_reserve_space(xdr, 16); if (!p) goto out_resource; if (exp->ex_fslocs.migrated) { p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR); p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR); } else switch(fsid_source(fhp)) { case FSIDSOURCE_FSID: p = xdr_encode_hyper(p, (u64)exp->ex_fsid); p = xdr_encode_hyper(p, (u64)0); break; case FSIDSOURCE_DEV: *p++ = cpu_to_be32(0); *p++ = cpu_to_be32(MAJOR(stat.dev)); *p++ = cpu_to_be32(0); *p++ = cpu_to_be32(MINOR(stat.dev)); break; case FSIDSOURCE_UUID: p = xdr_encode_opaque_fixed(p, exp->ex_uuid, EX_UUID_LEN); break; } } if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; *p++ = cpu_to_be32(0); } if (bmval0 & FATTR4_WORD0_LEASE_TIME) { p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; *p++ = cpu_to_be32(nn->nfsd4_lease); } if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; *p++ = cpu_to_be32(rdattr_err); } if (bmval0 & FATTR4_WORD0_ACL) { struct nfs4_ace *ace; if (acl == NULL) { p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; *p++ = cpu_to_be32(0); goto out_acl; } p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; *p++ = cpu_to_be32(acl->naces); for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { p = xdr_reserve_space(xdr, 4*3); if (!p) goto out_resource; *p++ = cpu_to_be32(ace->type); *p++ = cpu_to_be32(ace->flag); *p++ = cpu_to_be32(ace->access_mask & NFS4_ACE_MASK_ALL); status = nfsd4_encode_aclname(xdr, rqstp, ace); if (status) goto out; } } out_acl: if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ? ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); } if (bmval0 & FATTR4_WORD0_CANSETTIME) { p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; *p++ = cpu_to_be32(1); } if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; *p++ = cpu_to_be32(0); } if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; *p++ = cpu_to_be32(1); } if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; *p++ = cpu_to_be32(1); } if (bmval0 & FATTR4_WORD0_FILEHANDLE) { p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4); if (!p) goto out_resource; p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, fhp->fh_handle.fh_size); } if (bmval0 & FATTR4_WORD0_FILEID) { p = xdr_reserve_space(xdr, 8); if (!p) goto out_resource; p = xdr_encode_hyper(p, stat.ino); } if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { p = xdr_reserve_space(xdr, 8); if (!p) goto out_resource; p = xdr_encode_hyper(p, (u64) statfs.f_ffree); } if (bmval0 & FATTR4_WORD0_FILES_FREE) { p = xdr_reserve_space(xdr, 8); if (!p) goto out_resource; p = xdr_encode_hyper(p, (u64) statfs.f_ffree); } if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { p = xdr_reserve_space(xdr, 8); if (!p) goto out_resource; p = xdr_encode_hyper(p, (u64) statfs.f_files); } if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { status = nfsd4_encode_fs_locations(xdr, rqstp, exp); if (status) goto out; } if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; *p++ = cpu_to_be32(1); } if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { p = xdr_reserve_space(xdr, 8); if (!p) goto out_resource; p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes); } if (bmval0 & FATTR4_WORD0_MAXLINK) { p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; *p++ = cpu_to_be32(255); } if (bmval0 & FATTR4_WORD0_MAXNAME) { p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; *p++ = cpu_to_be32(statfs.f_namelen); } if (bmval0 & FATTR4_WORD0_MAXREAD) { p = xdr_reserve_space(xdr, 8); if (!p) goto out_resource; p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); } if (bmval0 & FATTR4_WORD0_MAXWRITE) { p = xdr_reserve_space(xdr, 8); if (!p) goto out_resource; p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); } if (bmval1 & FATTR4_WORD1_MODE) { p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; *p++ = cpu_to_be32(stat.mode & S_IALLUGO); } if (bmval1 & FATTR4_WORD1_NO_TRUNC) { p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; *p++ = cpu_to_be32(1); } if (bmval1 & FATTR4_WORD1_NUMLINKS) { p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; *p++ = cpu_to_be32(stat.nlink); } if (bmval1 & FATTR4_WORD1_OWNER) { status = nfsd4_encode_user(xdr, rqstp, stat.uid); if (status) goto out; } if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { status = nfsd4_encode_group(xdr, rqstp, stat.gid); if (status) goto out; } if (bmval1 & FATTR4_WORD1_RAWDEV) { p = xdr_reserve_space(xdr, 8); if (!p) goto out_resource; *p++ = cpu_to_be32((u32) MAJOR(stat.rdev)); *p++ = cpu_to_be32((u32) MINOR(stat.rdev)); } if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { p = xdr_reserve_space(xdr, 8); if (!p) goto out_resource; dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; p = xdr_encode_hyper(p, dummy64); } if (bmval1 & FATTR4_WORD1_SPACE_FREE) { p = xdr_reserve_space(xdr, 8); if (!p) goto out_resource; dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; p = xdr_encode_hyper(p, dummy64); } if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { p = xdr_reserve_space(xdr, 8); if (!p) goto out_resource; dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; p = xdr_encode_hyper(p, dummy64); } if (bmval1 & FATTR4_WORD1_SPACE_USED) { p = xdr_reserve_space(xdr, 8); if (!p) goto out_resource; dummy64 = (u64)stat.blocks << 9; p = xdr_encode_hyper(p, dummy64); } if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { p = xdr_reserve_space(xdr, 12); if (!p) goto out_resource; p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec); *p++ = cpu_to_be32(stat.atime.tv_nsec); } if (bmval1 & FATTR4_WORD1_TIME_DELTA) { p = xdr_reserve_space(xdr, 12); if (!p) goto out_resource; p = encode_time_delta(p, d_inode(dentry)); } if (bmval1 & FATTR4_WORD1_TIME_METADATA) { p = xdr_reserve_space(xdr, 12); if (!p) goto out_resource; p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec); *p++ = cpu_to_be32(stat.ctime.tv_nsec); } if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { p = xdr_reserve_space(xdr, 12); if (!p) goto out_resource; p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec); *p++ = cpu_to_be32(stat.mtime.tv_nsec); } if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { struct kstat parent_stat; u64 ino = stat.ino; p = xdr_reserve_space(xdr, 8); if (!p) goto out_resource; /* * Get parent's attributes if not ignoring crossmount * and this is the root of a cross-mounted filesystem. */ if (ignore_crossmnt == 0 && dentry == exp->ex_path.mnt->mnt_root) { err = get_parent_attributes(exp, &parent_stat); if (err) goto out_nfserr; ino = parent_stat.ino; } p = xdr_encode_hyper(p, ino); } #ifdef CONFIG_NFSD_PNFS if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) { status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types); if (status) goto out; } if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) { status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types); if (status) goto out; } if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) { p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; *p++ = cpu_to_be32(stat.blksize); } #endif /* CONFIG_NFSD_PNFS */ if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { u32 supp[3]; memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp)); supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0; supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1; supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2; status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]); if (status) goto out; } if (bmval2 & FATTR4_WORD2_CHANGE_ATTR_TYPE) { p = xdr_reserve_space(xdr, 4); if (!p) goto out_resource; if (IS_I_VERSION(d_inode(dentry))) *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_MONOTONIC_INCR); else *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_TIME_METADATA); } #ifdef CONFIG_NFSD_V4_SECURITY_LABEL if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { status = nfsd4_encode_security_label(xdr, rqstp, context, contextlen); if (status) goto out; } #endif attrlen = htonl(xdr->buf->len - attrlen_offset - 4); write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4); status = nfs_ok; out: #ifdef CONFIG_NFSD_V4_SECURITY_LABEL if (context) security_release_secctx(context, contextlen); #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ kfree(acl); if (tempfh) { fh_put(tempfh); kfree(tempfh); } if (status) xdr_truncate_encode(xdr, starting_len); return status; out_nfserr: status = nfserrno(err); goto out; out_resource: status = nfserr_resource; goto out; } static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p, int bytes) { xdr->scratch.iov_len = 0; memset(buf, 0, sizeof(struct xdr_buf)); buf->head[0].iov_base = p; buf->head[0].iov_len = 0; buf->len = 0; xdr->buf = buf; xdr->iov = buf->head; xdr->p = p; xdr->end = (void *)p + bytes; buf->buflen = bytes; } __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words, struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry, u32 *bmval, struct svc_rqst *rqstp, int ignore_crossmnt) { struct xdr_buf dummy; struct xdr_stream xdr; __be32 ret; svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2); ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp, ignore_crossmnt); *p = xdr.p; return ret; } static inline int attributes_need_mount(u32 *bmval) { if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) return 1; if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) return 1; return 0; } static __be32 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd, const char *name, int namlen) { struct svc_export *exp = cd->rd_fhp->fh_export; struct dentry *dentry; __be32 nfserr; int ignore_crossmnt = 0; dentry = lookup_positive_unlocked(name, cd->rd_fhp->fh_dentry, namlen); if (IS_ERR(dentry)) return nfserrno(PTR_ERR(dentry)); exp_get(exp); /* * In the case of a mountpoint, the client may be asking for * attributes that are only properties of the underlying filesystem * as opposed to the cross-mounted file system. In such a case, * we will not follow the cross mount and will fill the attribtutes * directly from the mountpoint dentry. */ if (nfsd_mountpoint(dentry, exp)) { int err; if (!(exp->ex_flags & NFSEXP_V4ROOT) && !attributes_need_mount(cd->rd_bmval)) { ignore_crossmnt = 1; goto out_encode; } /* * Why the heck aren't we just using nfsd_lookup?? * Different "."/".." handling? Something else? * At least, add a comment here to explain.... */ err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); if (err) { nfserr = nfserrno(err); goto out_put; } nfserr = check_nfsd_access(exp, cd->rd_rqstp); if (nfserr) goto out_put; } out_encode: nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval, cd->rd_rqstp, ignore_crossmnt); out_put: dput(dentry); exp_put(exp); return nfserr; } static __be32 * nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr) { __be32 *p; p = xdr_reserve_space(xdr, 20); if (!p) return NULL; *p++ = htonl(2); *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ *p++ = htonl(0); /* bmval1 */ *p++ = htonl(4); /* attribute length */ *p++ = nfserr; /* no htonl */ return p; } static int nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, loff_t offset, u64 ino, unsigned int d_type) { struct readdir_cd *ccd = ccdv; struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); struct xdr_stream *xdr = cd->xdr; int start_offset = xdr->buf->len; int cookie_offset; u32 name_and_cookie; int entry_bytes; __be32 nfserr = nfserr_toosmall; __be64 wire_offset; __be32 *p; /* In nfsv4, "." and ".." never make it onto the wire.. */ if (name && isdotent(name, namlen)) { cd->common.err = nfs_ok; return 0; } if (cd->cookie_offset) { wire_offset = cpu_to_be64(offset); write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset, &wire_offset, 8); } p = xdr_reserve_space(xdr, 4); if (!p) goto fail; *p++ = xdr_one; /* mark entry present */ cookie_offset = xdr->buf->len; p = xdr_reserve_space(xdr, 3*4 + namlen); if (!p) goto fail; p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ p = xdr_encode_array(p, name, namlen); /* name length & name */ nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen); switch (nfserr) { case nfs_ok: break; case nfserr_resource: nfserr = nfserr_toosmall; goto fail; case nfserr_noent: xdr_truncate_encode(xdr, start_offset); goto skip_entry; default: /* * If the client requested the RDATTR_ERROR attribute, * we stuff the error code into this attribute * and continue. If this attribute was not requested, * then in accordance with the spec, we fail the * entire READDIR operation(!) */ if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) goto fail; p = nfsd4_encode_rdattr_error(xdr, nfserr); if (p == NULL) { nfserr = nfserr_toosmall; goto fail; } } nfserr = nfserr_toosmall; entry_bytes = xdr->buf->len - start_offset; if (entry_bytes > cd->rd_maxcount) goto fail; cd->rd_maxcount -= entry_bytes; /* * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so * let's always let through the first entry, at least: */ if (!cd->rd_dircount) goto fail; name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8; if (name_and_cookie > cd->rd_dircount && cd->cookie_offset) goto fail; cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie); cd->cookie_offset = cookie_offset; skip_entry: cd->common.err = nfs_ok; return 0; fail: xdr_truncate_encode(xdr, start_offset); cd->common.err = nfserr; return -EINVAL; } static __be32 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid) { __be32 *p; p = xdr_reserve_space(xdr, sizeof(stateid_t)); if (!p) return nfserr_resource; *p++ = cpu_to_be32(sid->si_generation); p = xdr_encode_opaque_fixed(p, &sid->si_opaque, sizeof(stateid_opaque_t)); return 0; } static __be32 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) { struct xdr_stream *xdr = &resp->xdr; __be32 *p; p = xdr_reserve_space(xdr, 8); if (!p) return nfserr_resource; *p++ = cpu_to_be32(access->ac_supported); *p++ = cpu_to_be32(access->ac_resp_access); return 0; } static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts) { struct xdr_stream *xdr = &resp->xdr; __be32 *p; p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8); if (!p) return nfserr_resource; p = xdr_encode_opaque_fixed(p, bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); *p++ = cpu_to_be32(bcts->dir); /* Upshifting from TCP to RDMA is not supported */ *p++ = cpu_to_be32(0); return 0; } static __be32 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) { struct xdr_stream *xdr = &resp->xdr; return nfsd4_encode_stateid(xdr, &close->cl_stateid); } static __be32 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) { struct xdr_stream *xdr = &resp->xdr; __be32 *p; p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); if (!p) return nfserr_resource; p = xdr_encode_opaque_fixed(p, commit->co_verf.data, NFS4_VERIFIER_SIZE); return 0; } static __be32 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) { struct xdr_stream *xdr = &resp->xdr; __be32 *p; p = xdr_reserve_space(xdr, 20); if (!p) return nfserr_resource; encode_cinfo(p, &create->cr_cinfo); return nfsd4_encode_bitmap(xdr, create->cr_bmval[0], create->cr_bmval[1], create->cr_bmval[2]); } static __be32 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) { struct svc_fh *fhp = getattr->ga_fhp; struct xdr_stream *xdr = &resp->xdr; return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry, getattr->ga_bmval, resp->rqstp, 0); } static __be32 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) { struct xdr_stream *xdr = &resp->xdr; struct svc_fh *fhp = *fhpp; unsigned int len; __be32 *p; len = fhp->fh_handle.fh_size; p = xdr_reserve_space(xdr, len + 4); if (!p) return nfserr_resource; p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len); return 0; } /* * Including all fields other than the name, a LOCK4denied structure requires * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. */ static __be32 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld) { struct xdr_netobj *conf = &ld->ld_owner; __be32 *p; again: p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len)); if (!p) { /* * Don't fail to return the result just because we can't * return the conflicting open: */ if (conf->len) { kfree(conf->data); conf->len = 0; conf->data = NULL; goto again; } return nfserr_resource; } p = xdr_encode_hyper(p, ld->ld_start); p = xdr_encode_hyper(p, ld->ld_length); *p++ = cpu_to_be32(ld->ld_type); if (conf->len) { p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8); p = xdr_encode_opaque(p, conf->data, conf->len); kfree(conf->data); } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ p = xdr_encode_hyper(p, (u64)0); /* clientid */ *p++ = cpu_to_be32(0); /* length of owner name */ } return nfserr_denied; } static __be32 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) { struct xdr_stream *xdr = &resp->xdr; if (!nfserr) nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid); else if (nfserr == nfserr_denied) nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied); return nfserr; } static __be32 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) { struct xdr_stream *xdr = &resp->xdr; if (nfserr == nfserr_denied) nfsd4_encode_lock_denied(xdr, &lockt->lt_denied); return nfserr; } static __be32 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) { struct xdr_stream *xdr = &resp->xdr; return nfsd4_encode_stateid(xdr, &locku->lu_stateid); } static __be32 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) { struct xdr_stream *xdr = &resp->xdr; __be32 *p; p = xdr_reserve_space(xdr, 20); if (!p) return nfserr_resource; p = encode_cinfo(p, &link->li_cinfo); return 0; } static __be32 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) { struct xdr_stream *xdr = &resp->xdr; __be32 *p; nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid); if (nfserr) return nfserr; p = xdr_reserve_space(xdr, 24); if (!p) return nfserr_resource; p = encode_cinfo(p, &open->op_cinfo); *p++ = cpu_to_be32(open->op_rflags); nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1], open->op_bmval[2]); if (nfserr) return nfserr; p = xdr_reserve_space(xdr, 4); if (!p) return nfserr_resource; *p++ = cpu_to_be32(open->op_delegate_type); switch (open->op_delegate_type) { case NFS4_OPEN_DELEGATE_NONE: break; case NFS4_OPEN_DELEGATE_READ: nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); if (nfserr) return nfserr; p = xdr_reserve_space(xdr, 20); if (!p) return nfserr_resource; *p++ = cpu_to_be32(open->op_recall); /* * TODO: ACE's in delegations */ *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); *p++ = cpu_to_be32(0); *p++ = cpu_to_be32(0); *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ break; case NFS4_OPEN_DELEGATE_WRITE: nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); if (nfserr) return nfserr; p = xdr_reserve_space(xdr, 32); if (!p) return nfserr_resource; *p++ = cpu_to_be32(0); /* * TODO: space_limit's in delegations */ *p++ = cpu_to_be32(NFS4_LIMIT_SIZE); *p++ = cpu_to_be32(~(u32)0); *p++ = cpu_to_be32(~(u32)0); /* * TODO: ACE's in delegations */ *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); *p++ = cpu_to_be32(0); *p++ = cpu_to_be32(0); *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ break; case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */ switch (open->op_why_no_deleg) { case WND4_CONTENTION: case WND4_RESOURCE: p = xdr_reserve_space(xdr, 8); if (!p) return nfserr_resource; *p++ = cpu_to_be32(open->op_why_no_deleg); /* deleg signaling not supported yet: */ *p++ = cpu_to_be32(0); break; default: p = xdr_reserve_space(xdr, 4); if (!p) return nfserr_resource; *p++ = cpu_to_be32(open->op_why_no_deleg); } break; default: BUG(); } /* XXX save filehandle here */ return 0; } static __be32 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) { struct xdr_stream *xdr = &resp->xdr; return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid); } static __be32 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) { struct xdr_stream *xdr = &resp->xdr; return nfsd4_encode_stateid(xdr, &od->od_stateid); } static __be32 nfsd4_encode_splice_read( struct nfsd4_compoundres *resp, struct nfsd4_read *read, struct file *file, unsigned long maxcount) { struct xdr_stream *xdr = &resp->xdr; struct xdr_buf *buf = xdr->buf; u32 eof; int space_left; __be32 nfserr; __be32 *p = xdr->p - 2; /* Make sure there will be room for padding if needed */ if (xdr->end - xdr->p < 1) return nfserr_resource; nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp, file, read->rd_offset, &maxcount, &eof); read->rd_length = maxcount; if (nfserr) { /* * nfsd_splice_actor may have already messed with the * page length; reset it so as not to confuse * xdr_truncate_encode: */ buf->page_len = 0; return nfserr; } *(p++) = htonl(eof); *(p++) = htonl(maxcount); buf->page_len = maxcount; buf->len += maxcount; xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1) / PAGE_SIZE; /* Use rest of head for padding and remaining ops: */ buf->tail[0].iov_base = xdr->p; buf->tail[0].iov_len = 0; xdr->iov = buf->tail; if (maxcount&3) { int pad = 4 - (maxcount&3); *(xdr->p++) = 0; buf->tail[0].iov_base += maxcount&3; buf->tail[0].iov_len = pad; buf->len += pad; } space_left = min_t(int, (void *)xdr->end - (void *)xdr->p, buf->buflen - buf->len); buf->buflen = buf->len + space_left; xdr->end = (__be32 *)((void *)xdr->end + space_left); return 0; } static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp, struct nfsd4_read *read, struct file *file, unsigned long maxcount) { struct xdr_stream *xdr = &resp->xdr; u32 eof; int v; int starting_len = xdr->buf->len - 8; long len; int thislen; __be32 nfserr; __be32 tmp; __be32 *p; u32 zzz = 0; int pad; len = maxcount; v = 0; thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p)); p = xdr_reserve_space(xdr, (thislen+3)&~3); WARN_ON_ONCE(!p); resp->rqstp->rq_vec[v].iov_base = p; resp->rqstp->rq_vec[v].iov_len = thislen; v++; len -= thislen; while (len) { thislen = min_t(long, len, PAGE_SIZE); p = xdr_reserve_space(xdr, (thislen+3)&~3); WARN_ON_ONCE(!p); resp->rqstp->rq_vec[v].iov_base = p; resp->rqstp->rq_vec[v].iov_len = thislen; v++; len -= thislen; } read->rd_vlen = v; len = maxcount; nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen, &maxcount, &eof); read->rd_length = maxcount; if (nfserr) return nfserr; xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3)); tmp = htonl(eof); write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4); tmp = htonl(maxcount); write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4); pad = (maxcount&3) ? 4 - (maxcount&3) : 0; write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount, &zzz, pad); return 0; } static __be32 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_read *read) { unsigned long maxcount; struct xdr_stream *xdr = &resp->xdr; struct file *file; int starting_len = xdr->buf->len; __be32 *p; if (nfserr) return nfserr; file = read->rd_nf->nf_file; p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */ if (!p) { WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)); return nfserr_resource; } if (resp->xdr.buf->page_len && test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) { WARN_ON_ONCE(1); return nfserr_resource; } xdr_commit_encode(xdr); maxcount = svc_max_payload(resp->rqstp); maxcount = min_t(unsigned long, maxcount, (xdr->buf->buflen - xdr->buf->len)); maxcount = min_t(unsigned long, maxcount, read->rd_length); if (file->f_op->splice_read && test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount); else nfserr = nfsd4_encode_readv(resp, read, file, maxcount); if (nfserr) xdr_truncate_encode(xdr, starting_len); return nfserr; } static __be32 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) { int maxcount; __be32 wire_count; int zero = 0; struct xdr_stream *xdr = &resp->xdr; int length_offset = xdr->buf->len; __be32 *p; p = xdr_reserve_space(xdr, 4); if (!p) return nfserr_resource; maxcount = PAGE_SIZE; p = xdr_reserve_space(xdr, maxcount); if (!p) return nfserr_resource; /* * XXX: By default, vfs_readlink() will truncate symlinks if they * would overflow the buffer. Is this kosher in NFSv4? If not, one * easy fix is: if vfs_readlink() precisely fills the buffer, assume * that truncation occurred, and return NFS4ERR_RESOURCE. */ nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, (char *)p, &maxcount); if (nfserr == nfserr_isdir) nfserr = nfserr_inval; if (nfserr) { xdr_truncate_encode(xdr, length_offset); return nfserr; } wire_count = htonl(maxcount); write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4); xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4)); if (maxcount & 3) write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount, &zero, 4 - (maxcount&3)); return 0; } static __be32 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) { int maxcount; int bytes_left; loff_t offset; __be64 wire_offset; struct xdr_stream *xdr = &resp->xdr; int starting_len = xdr->buf->len; __be32 *p; p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); if (!p) return nfserr_resource; /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ *p++ = cpu_to_be32(0); *p++ = cpu_to_be32(0); resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p) - (char *)resp->xdr.buf->head[0].iov_base; /* * Number of bytes left for directory entries allowing for the * final 8 bytes of the readdir and a following failed op: */ bytes_left = xdr->buf->buflen - xdr->buf->len - COMPOUND_ERR_SLACK_SPACE - 8; if (bytes_left < 0) { nfserr = nfserr_resource; goto err_no_verf; } maxcount = svc_max_payload(resp->rqstp); maxcount = min_t(u32, readdir->rd_maxcount, maxcount); /* * Note the rfc defines rd_maxcount as the size of the * READDIR4resok structure, which includes the verifier above * and the 8 bytes encoded at the end of this function: */ if (maxcount < 16) { nfserr = nfserr_toosmall; goto err_no_verf; } maxcount = min_t(int, maxcount-16, bytes_left); /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */ if (!readdir->rd_dircount) readdir->rd_dircount = svc_max_payload(resp->rqstp); readdir->xdr = xdr; readdir->rd_maxcount = maxcount; readdir->common.err = 0; readdir->cookie_offset = 0; offset = readdir->rd_cookie; nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, &offset, &readdir->common, nfsd4_encode_dirent); if (nfserr == nfs_ok && readdir->common.err == nfserr_toosmall && xdr->buf->len == starting_len + 8) { /* nothing encoded; which limit did we hit?: */ if (maxcount - 16 < bytes_left) /* It was the fault of rd_maxcount: */ nfserr = nfserr_toosmall; else /* We ran out of buffer space: */ nfserr = nfserr_resource; } if (nfserr) goto err_no_verf; if (readdir->cookie_offset) { wire_offset = cpu_to_be64(offset); write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset, &wire_offset, 8); } p = xdr_reserve_space(xdr, 8); if (!p) { WARN_ON_ONCE(1); goto err_no_verf; } *p++ = 0; /* no more entries */ *p++ = htonl(readdir->common.err == nfserr_eof); return 0; err_no_verf: xdr_truncate_encode(xdr, starting_len); return nfserr; } static __be32 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) { struct xdr_stream *xdr = &resp->xdr; __be32 *p; p = xdr_reserve_space(xdr, 20); if (!p) return nfserr_resource; p = encode_cinfo(p, &remove->rm_cinfo); return 0; } static __be32 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) { struct xdr_stream *xdr = &resp->xdr; __be32 *p; p = xdr_reserve_space(xdr, 40); if (!p) return nfserr_resource; p = encode_cinfo(p, &rename->rn_sinfo); p = encode_cinfo(p, &rename->rn_tinfo); return 0; } static __be32 nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp) { u32 i, nflavs, supported; struct exp_flavor_info *flavs; struct exp_flavor_info def_flavs[2]; __be32 *p, *flavorsp; static bool report = true; if (exp->ex_nflavors) { flavs = exp->ex_flavors; nflavs = exp->ex_nflavors; } else { /* Handling of some defaults in absence of real secinfo: */ flavs = def_flavs; if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { nflavs = 2; flavs[0].pseudoflavor = RPC_AUTH_UNIX; flavs[1].pseudoflavor = RPC_AUTH_NULL; } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { nflavs = 1; flavs[0].pseudoflavor = svcauth_gss_flavor(exp->ex_client); } else { nflavs = 1; flavs[0].pseudoflavor = exp->ex_client->flavour->flavour; } } supported = 0; p = xdr_reserve_space(xdr, 4); if (!p) return nfserr_resource; flavorsp = p++; /* to be backfilled later */ for (i = 0; i < nflavs; i++) { rpc_authflavor_t pf = flavs[i].pseudoflavor; struct rpcsec_gss_info info; if (rpcauth_get_gssinfo(pf, &info) == 0) { supported++; p = xdr_reserve_space(xdr, 4 + 4 + XDR_LEN(info.oid.len) + 4 + 4); if (!p) return nfserr_resource; *p++ = cpu_to_be32(RPC_AUTH_GSS); p = xdr_encode_opaque(p, info.oid.data, info.oid.len); *p++ = cpu_to_be32(info.qop); *p++ = cpu_to_be32(info.service); } else if (pf < RPC_AUTH_MAXFLAVOR) { supported++; p = xdr_reserve_space(xdr, 4); if (!p) return nfserr_resource; *p++ = cpu_to_be32(pf); } else { if (report) pr_warn("NFS: SECINFO: security flavor %u " "is not supported\n", pf); } } if (nflavs != supported) report = false; *flavorsp = htonl(supported); return 0; } static __be32 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_secinfo *secinfo) { struct xdr_stream *xdr = &resp->xdr; return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp); } static __be32 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_secinfo_no_name *secinfo) { struct xdr_stream *xdr = &resp->xdr; return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp); } /* * The SETATTR encode routine is special -- it always encodes a bitmap, * regardless of the error status. */ static __be32 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) { struct xdr_stream *xdr = &resp->xdr; __be32 *p; p = xdr_reserve_space(xdr, 16); if (!p) return nfserr_resource; if (nfserr) { *p++ = cpu_to_be32(3); *p++ = cpu_to_be32(0); *p++ = cpu_to_be32(0); *p++ = cpu_to_be32(0); } else { *p++ = cpu_to_be32(3); *p++ = cpu_to_be32(setattr->sa_bmval[0]); *p++ = cpu_to_be32(setattr->sa_bmval[1]); *p++ = cpu_to_be32(setattr->sa_bmval[2]); } return nfserr; } static __be32 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) { struct xdr_stream *xdr = &resp->xdr; __be32 *p; if (!nfserr) { p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE); if (!p) return nfserr_resource; p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8); p = xdr_encode_opaque_fixed(p, &scd->se_confirm, NFS4_VERIFIER_SIZE); } else if (nfserr == nfserr_clid_inuse) { p = xdr_reserve_space(xdr, 8); if (!p) return nfserr_resource; *p++ = cpu_to_be32(0); *p++ = cpu_to_be32(0); } return nfserr; } static __be32 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) { struct xdr_stream *xdr = &resp->xdr; __be32 *p; p = xdr_reserve_space(xdr, 16); if (!p) return nfserr_resource; *p++ = cpu_to_be32(write->wr_bytes_written); *p++ = cpu_to_be32(write->wr_how_written); p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, NFS4_VERIFIER_SIZE); return 0; } static __be32 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_exchange_id *exid) { struct xdr_stream *xdr = &resp->xdr; __be32 *p; char *major_id; char *server_scope; int major_id_sz; int server_scope_sz; uint64_t minor_id = 0; major_id = utsname()->nodename; major_id_sz = strlen(major_id); server_scope = utsname()->nodename; server_scope_sz = strlen(server_scope); p = xdr_reserve_space(xdr, 8 /* eir_clientid */ + 4 /* eir_sequenceid */ + 4 /* eir_flags */ + 4 /* spr_how */); if (!p) return nfserr_resource; p = xdr_encode_opaque_fixed(p, &exid->clientid, 8); *p++ = cpu_to_be32(exid->seqid); *p++ = cpu_to_be32(exid->flags); *p++ = cpu_to_be32(exid->spa_how); switch (exid->spa_how) { case SP4_NONE: break; case SP4_MACH_CRED: /* spo_must_enforce bitmap: */ nfserr = nfsd4_encode_bitmap(xdr, exid->spo_must_enforce[0], exid->spo_must_enforce[1], exid->spo_must_enforce[2]); if (nfserr) return nfserr; /* spo_must_allow bitmap: */ nfserr = nfsd4_encode_bitmap(xdr, exid->spo_must_allow[0], exid->spo_must_allow[1], exid->spo_must_allow[2]); if (nfserr) return nfserr; break; default: WARN_ON_ONCE(1); } p = xdr_reserve_space(xdr, 8 /* so_minor_id */ + 4 /* so_major_id.len */ + (XDR_QUADLEN(major_id_sz) * 4) + 4 /* eir_server_scope.len */ + (XDR_QUADLEN(server_scope_sz) * 4) + 4 /* eir_server_impl_id.count (0) */); if (!p) return nfserr_resource; /* The server_owner struct */ p = xdr_encode_hyper(p, minor_id); /* Minor id */ /* major id */ p = xdr_encode_opaque(p, major_id, major_id_sz); /* Server scope */ p = xdr_encode_opaque(p, server_scope, server_scope_sz); /* Implementation id */ *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */ return 0; } static __be32 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create_session *sess) { struct xdr_stream *xdr = &resp->xdr; __be32 *p; p = xdr_reserve_space(xdr, 24); if (!p) return nfserr_resource; p = xdr_encode_opaque_fixed(p, sess->sessionid.data, NFS4_MAX_SESSIONID_LEN); *p++ = cpu_to_be32(sess->seqid); *p++ = cpu_to_be32(sess->flags); p = xdr_reserve_space(xdr, 28); if (!p) return nfserr_resource; *p++ = cpu_to_be32(0); /* headerpadsz */ *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz); *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz); *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached); *p++ = cpu_to_be32(sess->fore_channel.maxops); *p++ = cpu_to_be32(sess->fore_channel.maxreqs); *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs); if (sess->fore_channel.nr_rdma_attrs) { p = xdr_reserve_space(xdr, 4); if (!p) return nfserr_resource; *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs); } p = xdr_reserve_space(xdr, 28); if (!p) return nfserr_resource; *p++ = cpu_to_be32(0); /* headerpadsz */ *p++ = cpu_to_be32(sess->back_channel.maxreq_sz); *p++ = cpu_to_be32(sess->back_channel.maxresp_sz); *p++ = cpu_to_be32(sess->back_channel.maxresp_cached); *p++ = cpu_to_be32(sess->back_channel.maxops); *p++ = cpu_to_be32(sess->back_channel.maxreqs); *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs); if (sess->back_channel.nr_rdma_attrs) { p = xdr_reserve_space(xdr, 4); if (!p) return nfserr_resource; *p++ = cpu_to_be32(sess->back_channel.rdma_attrs); } return 0; } static __be32 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_sequence *seq) { struct xdr_stream *xdr = &resp->xdr; __be32 *p; p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20); if (!p) return nfserr_resource; p = xdr_encode_opaque_fixed(p, seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); *p++ = cpu_to_be32(seq->seqid); *p++ = cpu_to_be32(seq->slotid); /* Note slotid's are numbered from zero: */ *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */ *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */ *p++ = cpu_to_be32(seq->status_flags); resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */ return 0; } static __be32 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_test_stateid *test_stateid) { struct xdr_stream *xdr = &resp->xdr; struct nfsd4_test_stateid_id *stateid, *next; __be32 *p; p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids)); if (!p) return nfserr_resource; *p++ = htonl(test_stateid->ts_num_ids); list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) { *p++ = stateid->ts_id_status; } return 0; } #ifdef CONFIG_NFSD_PNFS static __be32 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getdeviceinfo *gdev) { struct xdr_stream *xdr = &resp->xdr; const struct nfsd4_layout_ops *ops; u32 starting_len = xdr->buf->len, needed_len; __be32 *p; p = xdr_reserve_space(xdr, 4); if (!p) return nfserr_resource; *p++ = cpu_to_be32(gdev->gd_layout_type); /* If maxcount is 0 then just update notifications */ if (gdev->gd_maxcount != 0) { ops = nfsd4_layout_ops[gdev->gd_layout_type]; nfserr = ops->encode_getdeviceinfo(xdr, gdev); if (nfserr) { /* * We don't bother to burden the layout drivers with * enforcing gd_maxcount, just tell the client to * come back with a bigger buffer if it's not enough. */ if (xdr->buf->len + 4 > gdev->gd_maxcount) goto toosmall; return nfserr; } } if (gdev->gd_notify_types) { p = xdr_reserve_space(xdr, 4 + 4); if (!p) return nfserr_resource; *p++ = cpu_to_be32(1); /* bitmap length */ *p++ = cpu_to_be32(gdev->gd_notify_types); } else { p = xdr_reserve_space(xdr, 4); if (!p) return nfserr_resource; *p++ = 0; } return 0; toosmall: dprintk("%s: maxcount too small\n", __func__); needed_len = xdr->buf->len + 4 /* notifications */; xdr_truncate_encode(xdr, starting_len); p = xdr_reserve_space(xdr, 4); if (!p) return nfserr_resource; *p++ = cpu_to_be32(needed_len); return nfserr_toosmall; } static __be32 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_layoutget *lgp) { struct xdr_stream *xdr = &resp->xdr; const struct nfsd4_layout_ops *ops; __be32 *p; p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t)); if (!p) return nfserr_resource; *p++ = cpu_to_be32(1); /* we always set return-on-close */ *p++ = cpu_to_be32(lgp->lg_sid.si_generation); p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque, sizeof(stateid_opaque_t)); *p++ = cpu_to_be32(1); /* we always return a single layout */ p = xdr_encode_hyper(p, lgp->lg_seg.offset); p = xdr_encode_hyper(p, lgp->lg_seg.length); *p++ = cpu_to_be32(lgp->lg_seg.iomode); *p++ = cpu_to_be32(lgp->lg_layout_type); ops = nfsd4_layout_ops[lgp->lg_layout_type]; return ops->encode_layoutget(xdr, lgp); } static __be32 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_layoutcommit *lcp) { struct xdr_stream *xdr = &resp->xdr; __be32 *p; p = xdr_reserve_space(xdr, 4); if (!p) return nfserr_resource; *p++ = cpu_to_be32(lcp->lc_size_chg); if (lcp->lc_size_chg) { p = xdr_reserve_space(xdr, 8); if (!p) return nfserr_resource; p = xdr_encode_hyper(p, lcp->lc_newsize); } return 0; } static __be32 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_layoutreturn *lrp) { struct xdr_stream *xdr = &resp->xdr; __be32 *p; p = xdr_reserve_space(xdr, 4); if (!p) return nfserr_resource; *p++ = cpu_to_be32(lrp->lrs_present); if (lrp->lrs_present) return nfsd4_encode_stateid(xdr, &lrp->lr_sid); return 0; } #endif /* CONFIG_NFSD_PNFS */ static __be32 nfsd42_encode_write_res(struct nfsd4_compoundres *resp, struct nfsd42_write_res *write, bool sync) { __be32 *p; p = xdr_reserve_space(&resp->xdr, 4); if (!p) return nfserr_resource; if (sync) *p++ = cpu_to_be32(0); else { __be32 nfserr; *p++ = cpu_to_be32(1); nfserr = nfsd4_encode_stateid(&resp->xdr, &write->cb_stateid); if (nfserr) return nfserr; } p = xdr_reserve_space(&resp->xdr, 8 + 4 + NFS4_VERIFIER_SIZE); if (!p) return nfserr_resource; p = xdr_encode_hyper(p, write->wr_bytes_written); *p++ = cpu_to_be32(write->wr_stable_how); p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, NFS4_VERIFIER_SIZE); return nfs_ok; } static __be32 nfsd42_encode_nl4_server(struct nfsd4_compoundres *resp, struct nl4_server *ns) { struct xdr_stream *xdr = &resp->xdr; struct nfs42_netaddr *addr; __be32 *p; p = xdr_reserve_space(xdr, 4); *p++ = cpu_to_be32(ns->nl4_type); switch (ns->nl4_type) { case NL4_NETADDR: addr = &ns->u.nl4_addr; /* netid_len, netid, uaddr_len, uaddr (port included * in RPCBIND_MAXUADDRLEN) */ p = xdr_reserve_space(xdr, 4 /* netid len */ + (XDR_QUADLEN(addr->netid_len) * 4) + 4 /* uaddr len */ + (XDR_QUADLEN(addr->addr_len) * 4)); if (!p) return nfserr_resource; *p++ = cpu_to_be32(addr->netid_len); p = xdr_encode_opaque_fixed(p, addr->netid, addr->netid_len); *p++ = cpu_to_be32(addr->addr_len); p = xdr_encode_opaque_fixed(p, addr->addr, addr->addr_len); break; default: WARN_ON_ONCE(ns->nl4_type != NL4_NETADDR); return nfserr_inval; } return 0; } static __be32 nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_copy *copy) { __be32 *p; nfserr = nfsd42_encode_write_res(resp, ©->cp_res, copy->cp_synchronous); if (nfserr) return nfserr; p = xdr_reserve_space(&resp->xdr, 4 + 4); *p++ = xdr_one; /* cr_consecutive */ *p++ = cpu_to_be32(copy->cp_synchronous); return 0; } static __be32 nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_offload_status *os) { struct xdr_stream *xdr = &resp->xdr; __be32 *p; p = xdr_reserve_space(xdr, 8 + 4); if (!p) return nfserr_resource; p = xdr_encode_hyper(p, os->count); *p++ = cpu_to_be32(0); return nfserr; } static __be32 nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_copy_notify *cn) { struct xdr_stream *xdr = &resp->xdr; __be32 *p; if (nfserr) return nfserr; /* 8 sec, 4 nsec */ p = xdr_reserve_space(xdr, 12); if (!p) return nfserr_resource; /* cnr_lease_time */ p = xdr_encode_hyper(p, cn->cpn_sec); *p++ = cpu_to_be32(cn->cpn_nsec); /* cnr_stateid */ nfserr = nfsd4_encode_stateid(xdr, &cn->cpn_cnr_stateid); if (nfserr) return nfserr; /* cnr_src.nl_nsvr */ p = xdr_reserve_space(xdr, 4); if (!p) return nfserr_resource; *p++ = cpu_to_be32(1); return nfsd42_encode_nl4_server(resp, &cn->cpn_src); } static __be32 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_seek *seek) { __be32 *p; p = xdr_reserve_space(&resp->xdr, 4 + 8); *p++ = cpu_to_be32(seek->seek_eof); p = xdr_encode_hyper(p, seek->seek_pos); return 0; } static __be32 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) { return nfserr; } typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); /* * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 * since we don't need to filter out obsolete ops as this is * done in the decoding phase. */ static const nfsd4_enc nfsd4_enc_ops[] = { [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, [OP_READ] = (nfsd4_enc)nfsd4_encode_read, [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, /* NFSv4.1 operations */ [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session, [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop, [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop, [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, #ifdef CONFIG_NFSD_PNFS [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo, [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit, [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget, [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn, #else [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, #endif [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name, [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid, [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, /* NFSv4.2 operations */ [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy, [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_copy_notify, [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop, [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop, [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop, [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop, [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_offload_status, [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop, [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek, [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop, [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop, }; /* * Calculate whether we still have space to encode repsize bytes. * There are two considerations: * - For NFS versions >=4.1, the size of the reply must stay within * session limits * - For all NFS versions, we must stay within limited preallocated * buffer space. * * This is called before the operation is processed, so can only provide * an upper estimate. For some nonidempotent operations (such as * getattr), it's not necessarily a problem if that estimate is wrong, * as we can fail it after processing without significant side effects. */ __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize) { struct xdr_buf *buf = &resp->rqstp->rq_res; struct nfsd4_slot *slot = resp->cstate.slot; if (buf->len + respsize <= buf->buflen) return nfs_ok; if (!nfsd4_has_session(&resp->cstate)) return nfserr_resource; if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) { WARN_ON_ONCE(1); return nfserr_rep_too_big_to_cache; } return nfserr_rep_too_big; } void nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) { struct xdr_stream *xdr = &resp->xdr; struct nfs4_stateowner *so = resp->cstate.replay_owner; struct svc_rqst *rqstp = resp->rqstp; const struct nfsd4_operation *opdesc = op->opdesc; int post_err_offset; nfsd4_enc encoder; __be32 *p; p = xdr_reserve_space(xdr, 8); if (!p) { WARN_ON_ONCE(1); return; } *p++ = cpu_to_be32(op->opnum); post_err_offset = xdr->buf->len; if (op->opnum == OP_ILLEGAL) goto status; if (op->status && opdesc && !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE)) goto status; BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || !nfsd4_enc_ops[op->opnum]); encoder = nfsd4_enc_ops[op->opnum]; op->status = encoder(resp, op->status, &op->u); if (opdesc && opdesc->op_release) opdesc->op_release(&op->u); xdr_commit_encode(xdr); /* nfsd4_check_resp_size guarantees enough room for error status */ if (!op->status) { int space_needed = 0; if (!nfsd4_last_compound_op(rqstp)) space_needed = COMPOUND_ERR_SLACK_SPACE; op->status = nfsd4_check_resp_size(resp, space_needed); } if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) { struct nfsd4_slot *slot = resp->cstate.slot; if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) op->status = nfserr_rep_too_big_to_cache; else op->status = nfserr_rep_too_big; } if (op->status == nfserr_resource || op->status == nfserr_rep_too_big || op->status == nfserr_rep_too_big_to_cache) { /* * The operation may have already been encoded or * partially encoded. No op returns anything additional * in the case of one of these three errors, so we can * just truncate back to after the status. But it's a * bug if we had to do this on a non-idempotent op: */ warn_on_nonidempotent_op(op); xdr_truncate_encode(xdr, post_err_offset); } if (so) { int len = xdr->buf->len - post_err_offset; so->so_replay.rp_status = op->status; so->so_replay.rp_buflen = len; read_bytes_from_xdr_buf(xdr->buf, post_err_offset, so->so_replay.rp_buf, len); } status: /* Note that op->status is already in network byte order: */ write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4); } /* * Encode the reply stored in the stateowner reply cache * * XDR note: do not encode rp->rp_buflen: the buffer contains the * previously sent already encoded operation. */ void nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op) { __be32 *p; struct nfs4_replay *rp = op->replay; p = xdr_reserve_space(xdr, 8 + rp->rp_buflen); if (!p) { WARN_ON_ONCE(1); return; } *p++ = cpu_to_be32(op->opnum); *p++ = rp->rp_status; /* already xdr'ed */ p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen); } int nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p) { return xdr_ressize_check(rqstp, p); } void nfsd4_release_compoundargs(struct svc_rqst *rqstp) { struct nfsd4_compoundargs *args = rqstp->rq_argp; if (args->ops != args->iops) { kfree(args->ops); args->ops = args->iops; } kfree(args->tmpp); args->tmpp = NULL; while (args->to_free) { struct svcxdr_tmpbuf *tb = args->to_free; args->to_free = tb->next; kfree(tb); } } int nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p) { struct nfsd4_compoundargs *args = rqstp->rq_argp; if (rqstp->rq_arg.head[0].iov_len % 4) { /* client is nuts */ dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)", __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid)); return 0; } args->p = p; args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; args->pagelist = rqstp->rq_arg.pages; args->pagelen = rqstp->rq_arg.page_len; args->tail = false; args->tmpp = NULL; args->to_free = NULL; args->ops = args->iops; args->rqstp = rqstp; return !nfsd4_decode_compound(args); } int nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p) { /* * All that remains is to write the tag and operation count... */ struct nfsd4_compoundres *resp = rqstp->rq_resp; struct xdr_buf *buf = resp->xdr.buf; WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len + buf->tail[0].iov_len); rqstp->rq_next_page = resp->xdr.page_ptr + 1; p = resp->tagp; *p++ = htonl(resp->taglen); memcpy(p, resp->tag, resp->taglen); p += XDR_QUADLEN(resp->taglen); *p++ = htonl(resp->opcnt); nfsd4_sequence_done(resp); return 1; } /* * Local variables: * c-basic-offset: 8 * End: */
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